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High-level liquid waste (HLLW) generated through nuclear reactions and spent fuel reprocessing contains the critical transuranic element neptunium (Np). Thus, the efficient recovery of Np from HLLW via the TRPO (trialkylphosphine oxide) process is not only beneficial for radioactive contamination remediation but also boosts the recycling of precious nuclear resources. However, this process including Np(V)–Np(IV) conversion is highly dependent on the components coexisting in HLLW, and its underlying mechanism is still not clear, restricting the recovery of Np in multiple scenarios. Herein, the effect of coexisting metal ions on the reduction and extraction of Np(V) was studied, and molybdenum (Mo) was identified to play a vital role in this course. Additionally, in combination with absorption spectral analysis, X-ray photoelectron spectroscopy and solvent extraction, the promotion of the extraction of Np by Mo was elucidated to be due to the catalytic reduction effect both in the aqueous phase and organic phase. This study can help researchers better understand the redox chemistry of Np in the treatment of HLLW. [ABSTRACT FROM AUTHOR]

Bis‐1,2,4‐triazine ligands are amongst the most promising soft N‐donor ligands for the partitioning of trivalent actinides from trivalent lanthanides; a key separation proposed in the future reprocessing of spent nuclear fuels. In an effort to improve the extraction properties of these benchmark ligands, we propose herein a general ligand design approach that is inspired by the field of drug discovery, and we apply it to a new class of ligands in which the bidentate 3‐(2‐pyridyl)‐1,2,4‐triazine unit of the benchmark ligands is replaced by a bidentate 1,2,4‐triazine‐3‐carboxamide unit. A series of nine novel ligands were synthesized by reactions of readily available ethyl 1,2,4‐triazine‐3‐carboxylate building blocks with different polyamine cores and evaluated for their ability to extract and separate Am(III) and Cm(III) from Eu(III). One of the reported ligands can co‐extract Am(III) and Eu(III) from nitric acid into cyclohexanone, albeit with no selectivity between the metal ions. NMR titration experiments suggested that ligand 23 b formed a chiral 1 : 1 complex species with La(III) but not Lu(III) or Y(III), suggesting the coordination cavity of the ligand is sensitive to the size of the metal ion. The structures and thermodynamic parameters for the proposed complexes were further supported by DFT calculations. [ABSTRACT FROM AUTHOR]

The increasing interest in natural food colorants (NFCs) has prompted extensive research and development. In addition to increasing the visual appeal of food products, NFCs provide health benefits through their bioactive compounds. The extraction and concentration stages of NFC production are vital to obtain concentrated liquid or powder NFCs. However, conventional organic solvents used in extraction raise health, safety, and environmental concerns. The development of novel extraction techniques, including ultrasound, microwave, and enzyme-assisted methods, has shown promising yield, efficiency, and solvent requirements. The application of green solvents, such as ionic liquids and Deep Eutectic Solvents (DES), also demonstrates their potential, presenting a need for further evaluation and consumer safety regulations. In the concentration stage, thermal evaporation and multi-stage vacuum processes remain common, while the possibility of membrane technology, particularly low-temperature osmotic-based membranes such as Forward Osmosis (FO) and Osmotic Membrane Distillation (OMD), is being explored. The challenges of fouling and wetting in OMD operations highlight the need for advanced membrane materials to optimize NFC concentration. This comprehensive review underscores the opportunities and challenges in NFCs production, emphasizing the potential for innovative extraction techniques, sustainable solvents, and membrane technologies as innovative concentration methods to shape the future of NFC production. [ABSTRACT FROM AUTHOR]

Maize flour is the staple food in many African countries, which is often contaminated with mycotoxin‐producing fungi. In this study, fungal contamination and the concentrations of fumonisins B1 and B2 in different types of maize flour in Malawi were examined, and the risk of mycotoxicosis, including endemic cancer, development was assessed. Data on the maize flour consumption of 187 Malawians were collected using a self‐generated questionnaire. Fifty‐nine samples of four differently processed types of flour from home‐grown maize were collected and screened for mycotoxins using high‐performance liquid chromatography–mass spectrometry (HPLC‐MS). Fumonisin B1 and B2 concentrations in maize flour and daily individual intakes were quantified by combined accelerated solvent extraction, solid phase extraction, and HPLC‐MS detection. The fumonisin concentrations ranged from 0.00 to 10,306.65 μg/kg maize, with a median concentration of 230.20 μg/kg (interquartile range (IQR), 592.77), and differed significantly among the four flour types. The median daily intake of fumonisins B1 and B2 per kilogram body weight was 3.01 μg (IQR, 6.47) and was significantly greater for deya flour (8.17 μg (IQR, 12.84)) than for mgaiwa flour (3.73 μg (IQR, 6.23); p = 0.046), gramil flour (1.08 μg (IQR, 2.39); p = 0.030), and white flour (1.18 μg (IQR, 2.78); p = 0.002). This intake exceeded the legitimate upper limit in 75% of individuals, by about nine times on average. The reduction of fumonisin intake is crucial to lower the associated disease risk and burden and can be achieved by changing the kernel processing method, improving storage conditions, and introducing sorghum and millet as possible staple food alternatives in Malawi. [ABSTRACT FROM AUTHOR]

The increasing demand for platinum group metals (PGMs) across various industries indicates the importance of recovering these noble metals from secondary resources. Typically, after pretreatment, PGMs are dissolved using hydrochloric acid solutions containing strong oxidant by virtue of the chemical stability of their anionic chloro-complexes. Several separation techniques, including cementation, precipitation, ion exchange, and solvent extraction, are employed to separate PGMs from leaching solutions. Each method has distinct advantages and limitations concerning efficiency and product purity. Cementation proves effective for concentrating PGMs in solutions containing base metal ions. However, ion exchange and solvent extraction are more commonly used for the separation of PGMs present in hydrochloric acid leaching solutions. Especially, solvent extraction processes employing commercial extractants, ionic liquids, and deep eutectic solvents have been extensively investigated. While deep eutectic solvents show promising as ‘green’ extractants, further research is required to overcome their limitations for industrial applications. A combined process integrating leaching, solvent extraction, and precipitation could offer an efficient solution for recovering high-purity PGMs from the solution containing diverse metal ions. [ABSTRACT FROM AUTHOR]

Brewers' spent grain is known as the main by-product obtained during the initial stage of brewing, accounting for 85% of the overall solid by-product from the process. This material contains valuable components, including lignocellulose, proteins, lipids, minerals, vitamins, and phenolic compounds. To recover these constituents, various extraction techniques have been used. Deep Eutectic Solvents (DES) are an emerging group of green solvents utilized for the extraction of organic compounds from biomasses. DES is composed of two or more compounds that act as hydrogen bond acceptors and hydrogen bond donors. Choline chloride is mostly used as a hydrogen bond acceptor in combination with several hydrogen bond donors. While many methods can be used to prepare the solvents, heating with continuous stirring at approximately 50–80°C is the most common technique. To improve extraction efficiency, the physicochemical properties of solvent mixtures need to be considered, such as the composition of those solvents, viscosity, polarity, and molar ratio of solvents. Extraction time and temperature, solid-to-liquid ratio, and water content, are also important. This review intends to present information on deep eutectic solvents and their current application in extracting brewers' spent grain. [ABSTRACT FROM AUTHOR]

Rationale: The development of analytical screening techniques for pesticides is crucial for preventing and mitigating environmental contamination. Mass spectrometry‐based screening methods differ based on the complexity of the sample matrix and the diversity of the target compounds. One of the major challenges is balancing cost reduction in the extraction process with the optimization of analytical results. This protocol introduces a universal and efficient scheme for the qualitative and quantitative schemes for 45 pesticides within a single analytical run. Methods: Water samples were extracted using an SPE column, with the pH adjusted to 7. Soil samples were processed using a modified QuEChERS method. The pretreatment for water samples emphasized selecting appropriate SPE columns and optimizing pH, while for soil samples, the focus was on choosing suitable extraction solvents and extraction salt packages. The enriched samples were then analyzed using liquid chromatography–tandem mass spectrometry (LC–MS/MS). The method was evaluated for accuracy, precision, detection limits, and matrix effects. Results: The method enabled the simultaneous detection of 45 pesticides within a 15‐minute analysis period. SPE recoveries ranged from 56.1% to 118.8%. Instrumental detection limits varied between 0.02 and 1 pg, while method detection limits extended from 0.05 to 18.47 ng/l in soil and water matrices. The approach was successfully applied to water and soil samples, with the pesticide concentration ranging from 0.1 ng/L to 38 μg/L. Conclusions: The protocol substantially enhances the characterization and quantification of 45 pesticides in environmental samples, achieving a remarkable reduction in detection limits by an order of magnitude compared to previous research. This method enables the simultaneous detection of pesticides in both water and soil matrices using a single system, addressing the challenges of using separate systems for different environmental media. Furthermore, this protocol provides a crucial theoretical foundation for managing and safeguarding against pesticide pollution. [ABSTRACT FROM AUTHOR]

Deep Eutectic Solvents (DESs) have emerged as promising eco-friendly pre-treatment agents for lignocellulosic biomass, offering considerable advantages for the nanofibrillation process. This study investigates the impact of DESs on cellulose fibers morphology, focusing on solubilization phenomena in the amorphous regions that may facilitate cellulose nanofiber production. The pre-treatment process combining a DES (triethylmethylammonium chloride and imidazole, TEMA:IMD) with microwave (MW) energy was optimized to enhance the solubility of cellulosic fibers. A response surface methodology (RSM) was employed to optimize the DES-MW-assisted pre-treatment. Results show that the reaction time and the temperature significantly influence the solubility of cellulosic fibers. The optimized conditions resulted in cellulose fibers with low content of hemicellulose and lignin, high crystallinity index, and improved thermal stability. The effectiveness of DES-MW pre-treatment in producing cellulose nanofibers (CNFs) from native and pre-treated fibers was investigated. Cellulose fibers pre-treated with a DES yielded CNFs with a narrower diameter distribution. Overall, optimized DES-MW pre-treatment offers a promising strategy for the efficient and sustainable extraction of CNFs. [ABSTRACT FROM AUTHOR]

AbstractPlantaginis Semen (PS) are the dried mature seeds of Plantago asiatica L. or Plantagodepressa Willd. in the Plantago family. Its polysaccharides are important components of PS. Response surface methodology was used to optimize the ultrasonic-assisted deep eutectic solvent (DES) extraction process of PS polysaccharides (PSP). The results showed that the optimal extraction parameters were a solid-liquid ratio of 1:35 g/mL, an extraction time of 73 min, and a molar ratio of 2:1. The yield of PSP was 0.64% and 1.20% by water immersion and ultrasonic water extraction, respectively, indicating that the DES extraction method (2.21 ± 0.06%) is superior to these two methods, and the optimization effect is good. Through the α-glucosidase and α-amylase inhibition activities experiment, it was found that the IC50 values of PSPs-1 were 1122 and 220.5 μg/mL. DPPH·and ABTS+ scavenging activity experiments showed that the IC50 values of PSPs-1 were 19.2 and 4.3 μg/mL, respectively. Its molar ratio of monosaccharide composition is rhamnose: galactose: galacturonic acid: glucose: glucuronic acid: arabinose: mannose: xylose = 33.6:13.3:6.5:3:2.6:2:1.4:1. Therefore, this study can provide an experimental basis for the establishment of an industrialized production process of polysaccharides and the study of their biological activities. [ABSTRACT FROM AUTHOR]

Cortisol and testosterone are important biomarkers for diagnosing complex disorders, including polycystic ovary syndrome and Cushing's syndrome, where symptomatology usually overlaps with other prevalent disorders. This work proposes, for the first time, an analytical method based on a switchable hydrophilicity solvent as an extraction phase for the determination of cortisol and testosterone in oral fluid (OF) by high‐performance liquid chromatography with diode‐array detection. The optimized extraction conditions consisted of 1000 µL of OF, 100 µL of decanoic acid solution (65 mg/mL), 170 µL of Na2CO3, 900 µL of H2SO4 and 150 µL of acetonitrile for dilution. The method was validated, and coefficients of determination higher than 0.9926, the limit of detection of 4.55 ng/mL and the limit of quantification of 15.00 ng/mL were obtained. Intra‐day precision varied from 5.6% to 11.9%, inter‐day precision ranged from 6.1% to 13.5%, and relative recoveries ranged from 98.9% to 104.6% for cortisol, and 89.1% to 103.9% for testosterone. This methodology was successfully applied to five OF samples from volunteers. Moreover, the greenness of this methodology was evaluated based on the sample preparation metric of sustainability achieving a global score of 7.37 which can be considered sustainable. [ABSTRACT FROM AUTHOR]

The study evaluated the combined effects of drying methods (air drying [AD], hot AD [HAD], microwave drying [MD], and freeze‐drying [FD]) and ultrasonication parameters (sonication temperature [STemp]: 40, 50, and 60°C) and heating time (STime: 60 and 120 min) on natural deep eutectic solvent (NADES) extraction of phytochemicals from Amaranthus hybridus stem. Increasing the STemp increased the extraction yield (ECY) of the phytochemicals for all drying methods but increase in the heating time reduced the ECY slightly. MD combined with 60°C ST showed the highest ECY (53%), whereas HAD combined with 40°C ST had the lowest ECY (18%). At 60 min heating time, increasing the ST from 40 to 50°C increased the total phenolic content (TPC) in the extract for most drying methods except MD, and a sonication time of 120 min showed a slightly higher TPC, especially for MD samples. At 60 min sonication, total flavonoid content (TFC, 800 mgQE/g) was highest for AD plus 50°C ST and lowest for AD combined with 60°C (100 mgQE/g), whereas for 120 min sonication, MD and AD with 50°C showed the highest TFC (690 mgQE/g). FD retained better some of the vitamins (thiamine, riboflavin, niacin) but MD retained better vitamin C. The antioxidant capacity was not so much different among the drying methods except for FD, which showed lower values. These results provide a theoretical basis for the synergistic applications of drying and ultrasonication during NADES extraction of phytochemicals from Amaranthus hybridus. [ABSTRACT FROM AUTHOR]

Levodopa (LD) is the first discovered and the most promising and effective medication for Parkinson's disease (PD). As the first identified natural source of LD, Vicia faba L. (broad beans), especially its sprouts, has been confirmed to contain many other potential bioactive compounds that could also be therapeutic for PD. In this study, the bioactive components obtained from broad bean sprout extraction (BSE) that could be beneficial for PD treatment were screened, and the related mechanisms were explored. Solvent extraction combined with column chromatography was used to isolate bioactive fractions and monomer compounds, while UPLC-ESI-MS/MS, HRESI-MS and (1H, 13C) NMR were employed for compound identification. Network pharmacology techniques were applied to screen for potential mechanisms. A total of 52 compounds were identified in a 50% MeOH extract of broad bean sprouts. Moreover, twelve compounds were isolated and identified from ethyl acetate and n-butanol portions, including caffeic acid (1), trans-3-indoleacrylic acid (2), p-coumaric acid (3), protocatechualdehyde (4), isovitexin (5), isoquercetin (6), grosvenorine (7), kaempferol-3-O-rutinoside (8), isoschaftoside (9), narcissin (10), kaempferitrin (11) and trigonelline HCl (12). Compounds 2, 4, 7, 8 and 12 were isolated from Vicia faba L. for the first time. The potential mechanisms were determined by analyzing 557 drug targets, 2334 disease targets and 199 intersections between them using a protein–protein interaction (PPI) network, gene ontology (GO) analysis and Kyoto encyclopedia of genes and genomes (KEGG) enrichment. Further in vitro experiments confirmed that caffeic acid (compound 1) and p-coumaric acid (compound 3) have neuroprotective effects in 6-hydroxydopamine-treated SH-SY5Y cells and lipopolysaccharide-treated PC-12 cells through anti-inflammatory and antioxidant mechanisms. In conclusion, this study explored effective components in broad bean sprouts and performed in vitro evaluations. [ABSTRACT FROM AUTHOR]

A new approach to managing the extraction properties of eutectic solvents based on aliphatic alcohols is proposed. Aliphatic alcohols, when functioning as hydrogen bond donors within a eutectic solvent, significantly enhance the solvent's efficiency in extracting metal ions. Conversely, when the alcohol acts as a hydrogen bond acceptor, its extraction properties diminish. Molecular modelling reveals that the extraction efficiency of these alcohols is directly proportional to the intermolecular interaction energy between the components of the eutectic solvent. [ABSTRACT FROM AUTHOR]

Red seaweeds from the coastal shores of Ilo (Peru) are a natural source of high-value compounds beneficial to health due to their high antioxidant capacity. Thus, this work evaluated the effect of water–ethanol mixtures (0, 15, and 30%; v/v) at high temperatures (90, 120, and 150 °C) on the polyphenol content, antioxidant capacity, and polyphenols profile of red seaweed (Chondracanthus chamissoi) during a pressurized liquid extraction process, whose parameters were set at 10 atm, with a single cycle of extraction and a volume of 150%. An increase in temperature and ethanol had a positive effect on antioxidant compounds. Thus, the best processing conditions were established at 150 °C and 30% ethanol, allowing for the extraction of a high polyphenol content (2.04 mg GAE/g dw) and antioxidant capacity (IC50: 7.46 mg/mL, ORAC: 148.98 μmol TE/g dw). High ethanol concentrations (30%) effectively recovered phenolic acids, flavonols, and phlorotannins for the polyphenols profile. However, the use of pure water was more effective in recovering flavonols. Interestingly, using pure water as an extraction solvent at high temperatures allowed for a more significant inhibition of the α-amylase enzyme than water–ethanol mixtures under the same conditions. Finally, the results can be utilized for future industrial scaling and the potential utilization of extracts in developing diabetes treatments. [ABSTRACT FROM AUTHOR]

Piper betle L. (Piperaceae) is a herbal plant used in Thai traditional medicine for its antifungal and antiallergic properties, particularly through topical application. This study aimed to optimize the extraction of Piper betle leaves using natural deep eutectic solvents to enhance the extraction efficiency of eugenol, the active compound in Piper betle leaves. Various types of hydrogen bond donors—including glycolic acid, lactic acid, malic acid, tartaric acid, ascorbic acid, and citric acid—were combined with a hydrogen bond acceptor, choline chloride, to prepare natural deep eutectic solvents. The results indicated that lactic acid was the most effective hydrogen bond donor for eugenol extraction. Subsequently, the choline chloride:lactic acid molar ratios, the natural deep eutectic solvent:water mass ratios, and ultrasonication times were varied. Results showed that the optimal conditions based on one‐factor‐at‐a‐time approach were a choline chloride:lactic acid molar ratio of 1:5, a natural deep eutectic solvent:water mass ratio of 2:1, and an ultrasonication time of 30 min. Under these conditions, the eugenol concentration reached 457.22 ± 21.68 µg/mL, compared to 224.76 ± 6.99 µg/mL when ethanol was used. In conclusion, this study successfully optimized the extraction of eugenol from Piper betle leaves using natural deep eutectic solvents. These findings suggest that natural deep eutectic solvents could be a more effective solvent for the extraction of eugenol. [ABSTRACT FROM AUTHOR]

Honeysuckle, a traditional Chinese medicine, holds significant medicinal value, making it ubiquitous in the medical field. However, the efficient extraction of chlorogenic acid from Chinese herbal medicine while maintaining its pharmacological activity remains a pressing challenge. To address the issues of environmental pollution and inefficient extraction using traditional solvents, there is a need to develop a novel solvent. Due to their low cost, nontoxic, and environmentally friendly characteristics, deep eutectic solvents can be used for extracting traditional Chinese medicinal materials while preserving the activity of their active ingredients during the extraction process. In this study, we examined the antibacterial activity of chlorogenic acid, a key component of honeysuckle, after extraction using a deep eutectic solvent. We gained preliminary insights into the antibacterial activity of the extract against various bacteria, including Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa. Furthermore, we analyzed the antibacterial activity of extracts of different concentrations in liquid medium, and the morphology of the bacteria after inhibition was analyzed. These findings suggest that deep eutectic solvent (DES) is an efficient, environmentally friendly, and cost‐effective method for extracting the active components of honeysuckle. Moreover, the active components extracted using DES retain robust physiological activity. [ABSTRACT FROM AUTHOR]

An easy, safe, simple, and efficient pH‐switchable hydrophobic deep eutectic solvent (DES)‐based liquid‐phase microextraction was developed for the extraction of chlorobenzenes (CBs) from water samples followed by a gas chromatography–electron capture detector (GC–ECD). The switchability of the synthesized DESs was tested by changing the pH. The DES synthesized from thymol:octanoic acid (OA) in a molar ratio of 2:1 had the highest efficiency in extracting CBs from water samples. 1,4‐Dibromobenzene was used as internal standard (IS). The optimal conditions were established to be 20.0 µL of thymol:OA (2:1), 100 µL of 5 mol L−1 KOH, 100 µL of 5 mol L−1 HCl, 60 s of extraction time, and without salt addition. Under the optimum conditions, the calibration graphs were linear in the range of 0.005–150 µg L−1, and limits of detection were in the range of 0.001–0.03 µg L−1. The relative standard deviations, including intraday and inter‐day for 5.0 µg L−1 of dichlorobenzene isomers, 2.0 µg L−1 of trichlorobenzene and tetrachlorobenzene isomers, and 0.50 µg L−1 of pentachlorobenzene and hexachlorobenzene isomers in water with using IS, were in the range of 0.6%–3.2% (n = 7) and 3.8%–6.7% (n = 7), respectively. The accuracies, including inter‐day and intraday, were in the range of 93.5%–106.3% and 91.7%–109.4%, respectively. [ABSTRACT FROM AUTHOR]

For more than two millennia, Ferulago species have been revered as therapeutic herbs, maintaining their significance in present-day folk medicine practices. Therefore, the present study was conducted to investigate the phytochemical composition, inhibitory effects on metabolic enzymes, and possible therapeutic applications of F. trachycarpa, specifically focusing on its efficacy in diabetes management, anticholinergic effects, and antioxidant capabilities. The current investigation comprised an evaluation of a range of extracts acquired via conventional and modern methodologies, such as soxhlet (SOX), maceration (MAC) accelerated solvent extraction (ASE), homogenizer-assisted extraction (HAE), supercritical fluid extraction (SFE), microwave-assisted extraction (MW), and ultrasound-assisted extraction (UAE). Various techniques were employed to assess their antioxidant capacity and enzyme inhibition. Furthermore, the research utilized ultra-high performance liquid chromatography-MS/MS (UHPLC-MS/MS) to ascertain the principal phenolic compounds that are responsible for the antioxidant capacity observed in the various F. trachycarpa extracts. Among these, extracts from HAE, ASE, and MW revealed the most promise across all methodologies tested for their antioxidant potential. Furthermore, SFE and MAC extracts inhibited the most enzymes, including cholinesterases, tyrosinase, α -amylase, and α -glycosidase, indicating their potential as efficient natural treatments for several health-related issues. [ABSTRACT FROM AUTHOR]

Walnut oil was extracted using three different eco-friendly extraction methods, solvent extraction (using ethyl acetate [EA] and ethanol [ET]), aqueous enzymatic extraction (AEE), and ultrasound-assisted enzymatic extraction (UAEE), and their lipid yield, lipid composition, physicochemical analysis, mineral composition, total phenols, antioxidant capacity, and antimicrobial activity were analyzed and compared. The AEE technique offered a greater yield (50.6%) than the other extraction methods and gave comparatively higher linoleic acid (66.12%) content. Palmitic, oleic, linoleic, linolenic, and stearic acids were the principal components that GC/MS detected in all the oil samples. UAEE produced the most polyphenols (0.49 mgGAE/g), followed by AEE (0.46 mgGAE/g), EA (0.45 mgGAE/g), and ET (0.35 mgGAE/g). The DPPH assay results were in the order of UAEE (191 μmolTE/kg) > AEE (186 μmolTE/kg) > EA (153 μmolTE/kg) > ET (130 μmolTE/kg). The FRAP assay findings showed a similar pattern: UAEE (112 molTE/kg) > AEE (102 molTE/kg) > EA (96 molTE/kg) > ET (82 molTE/kg). Results suggested that for a higher extraction yield, AEE is the better technique and UAEE is the recommended method for enhancing walnut oil antioxidant capacity. Additionally, it was found that polyphenols considerably increased the antioxidant capacity of walnut oil and are thought to be health-promoting. The results demonstrated the antibacterial effectiveness of the extracted oil against Bacillus subtilis, Bacillus licheniformis, and Staphylococcus aureus. This study provides information about low-cost and ecofriendly technologies of walnut oil extraction for food, cosmetic, and medical uses. [ABSTRACT FROM AUTHOR]

Due to the scarcity of water in many parts of the world, wastewater generated by hydrometallurgical processes has been recognized as a valuable resource for recovery or reuse. A method for reusing hydrometallurgical raffinate in the leaching of low-grade oxide copper ore in a counter-current leaching process was evaluated. In the first stage of the investigation, the influential factors on copper leaching, such as the amount of acid consumed (200–400 g/kg of ore), the initial iron concentration of the raffinate (5–25 g/L), the liquid-to-solid ratio (2–10 mL/g), and the duration of the leaching process (15–75 min), were examined using response surface methodology coupled with central composite design. Two responses, copper recovery and final copper concentration, were selected to determine the optimal conditions for the leaching process. Based on the statistical model, it was found that using 325 g/kg of ore of consumed acid, an initial iron concentration of 10 g/L, a liquid-to-solid ratio of 4 mL/g, and a leaching time of 60 min would result in higher values for both responses. Confirmation runs were conducted to validate the selected conditions and the suitability of the statistical model. Additionally, compositional and morphological characterization of samples before and after the leaching process was conducted using field diffusion scanning electron microscopy and X-ray diffraction analysis, which showed the dissolution of compounds such as tenorite and cuprite. In the second stage, a two-unit counter-current leaching system was adopted, as hydrometallurgical processes are usually carried out in multiple stages on an industrial scale. This leaching system was designed to maximize copper dissolution by considering the information obtained from the response surface methodology. The use of this leaching system increased the overall leaching efficiency by up to 80%. By characterizing the solid samples, it was found that the copper extraction percentage in a counter-current leaching system could be increased by simultaneously precipitating iron-bearing compounds. [ABSTRACT FROM AUTHOR]

Plant‐based meat is projected to address world‐wide meat shortage and supply–demand imbalances, potentially promoting the growth of sustainable diet choices. Soybean is a key ingredient to produce this alternative food, but the off‐flavours that naturally occur in soy can hinder its widespread acceptance among consumers. This review extensively elaborates on the primary compounds responsible for off‐flavours, their formation mechanisms, and removal techniques. Lipoxygenase oxidation–reduction, oleosins removal, adjustment extrusion conditions, and β‐cyclodextrin treatment were discussed. Fermentation mechanisms, solvent extraction, enzymes hydrolysis, flavouring, and controlling storage conditions were summarised. The most crucial, safe, and effective techniques were enzyme restriction, β‐cyclodextrin treatment in conjugation with phospholipase A2, and modification of the extrusion condition. The reviews provide a systematic summary of the development and prevention methods for the undesirable flavour of soy protein isolate and soy‐based meat products. [ABSTRACT FROM AUTHOR]

BACKGROUND: To extract anthocyanins with high efficiency, a hypothesis for high‐speed shear homogenization extraction (HSHE) method was established through a combination of solvent and ultrasonic‐assisted extractions. The efficacy of this hypothesis was demonstrated by performing qualitative and quantitative analyses of 16 anthocyanins extracted from five northern vegetables, and five berry fruits using ultra‐high‐performance Q‐Exactive Orbitrap tandem mass spectrometry. Single‐factor experiments were conducted by varying ethanol concentration, temperature, pH and extraction cycles to determine the optimal conditions for this method. RESULTS: Optimal extraction conditions (ethanol 70–80%, 40–50 °C, pH 3–4, performed twice) were determined using an HSHE (5 min, 10 000 rpm, 25 °C) assisted shaker (60 min) and ultrasonication (40 kHz, 160 W cm−2, 30 min, 25 °C) procedure. Compared to the traditional non‐HSHE method, the total anthocyanin content obtained through HSHE extraction showed a significant increase, ranging from 1.0 to 3.9 times higher, with purple cabbage exhibiting the most pronounced enhancement in content. More types of anthocyanins were detected in blueberry (9), black bean (7) and raspberry (5), of which malvidin was the major anthocyanin (0.426 g kg−1) in blueberry, having an amount five times than previously obtained. CONCLUSION: The established HSHE method has been proven to be a superior technique for anthocyanin extraction, with higher extraction efficiency and concentrations. This technique also provides a new avenue for extracting bioactive compounds from diverse food sources, with potential applications in improving the functional properties of food products. © 2024 Society of Chemical Industry. [ABSTRACT FROM AUTHOR]

Used lubricating oil is generated by various machinery after extended operation. It is also referred to as spent mobile oil. Extremely hazardous waste lubricating oil is detrimental to the environment because it produces oxidative products when additives break down. Used lubricating oil is classified as a hazardous waste substance and has a negative impact on the environment. Polychlorinated biphenyls (PCBs), carcinogenic substances and other impurities make lubricating oil poisonous and pose a serious threat to human health and the environment. Re‐refining is considered the preferred technology for resource conservation, waste minimisation and reduced environmental hazards. The present study focuses on optimising the method of re‐refining waste lubricating oil. The effects of various operating parameters such as refining time, refining temperature, solvent‐to‐used oil ratio and flocculant dosage have been extensively studied to maximise the percentage recovery of lubricating oil. Optimum process parameters are (i) a refining time of 80 min, (ii) a refining temperature of 48°C, (iii) solvent‐to‐waste oil ratio of 5:1 (w/w) and (iv) a flocculant dosage of 2 g/kg of solvent; the optimum yield was found to be 75% with the solvent extraction method and 78% with the extraction–flocculation method, respectively. The purity and physico‐chemical properties of the recovered oil were thoroughly analysed using Fourier transform infrared spectroscopy and ASTM standard methods. It was concluded that refined oil can effectively reduce the ongoing oil crisis and create a clean, healthy environment. [ABSTRACT FROM AUTHOR]

Rosemary is a plant from the Lamiaceae family with antioxidant properties, Therefore, the purpose of this study was to extract rosemary plant extract using different solvents, methods (maceration, hot extraction, Soxhlet, percolation and sonication), particle size (300, 500 and 800 μm) and plant to solvent ratios (1:100, 2:100, 3:100, 4:100 & 5:100) were. In this experimental study, the amount of phenolic and flavonoid compounds was measured by aluminum chloride colorimetric method and the antioxidant activity of plant extracts was evaluated by DPPH method. To extract these compounds, different solvents and methods were used and compared and analyzed and Data analysis was performed using SPSS software and ANOVA test. The best solvents for the extraction of phenolic, flavonoid and antioxidant compounds were water -methanol (20:80). The amount of total phenolic compounds using this solvent was 7.172 (mg/g) and flavonoid compounds were 28.157 (mg/g) and the antioxidant activity to inhibit free radicals was 87.2586 (mg/lit). The best method for extracting phenolic compounds was Maceration method with a rate of 7.481 (mg/g) and for flavonoid compounds with a rate of 47.85 (mg/g) and 73.524 (mg/lit) to inhibit free radicals. The results show that in order to achieve the maximum extraction of total phenolic compounds, flavonoids and antioxidants in rosemary extract, use plant powder with a particle size of 300 μm, water solvent: methanol (80:20), plant to solvent ratio 1:100 (g/ml) and the use of maceration method should be used as optimal operating conditions. [ABSTRACT FROM AUTHOR]

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Acid oil produced from the acidulation of soapstock was investigated as a feedstock for producing a glycolipid biosurfactant, manosylerithritol lipid (MEL), by microbial fermentation. Fermentation with the optimized acid oil substrate concentration of 200 g L−1 resulted in 3.89 g L−1 of MEL. To enhance productivity, the titer MEL was produced by a multistage fermentation process with the periodic addition of 20–50 g L−1 substrate after the stationary phase of the culture. The repeated substrate feeding marginally enhanced the MEL titer up to 5.56 g L−1. The MEL from the culture broth was recovered by solvent extraction at different pH levels. Among the solvents tested, ethyl acetate: acetonitrile (9:1) demonstrated a higher partition coefficient value of 3.1 in acidic conditions with 75.6% MEL recovery. The MEL produced by using acid oil as feedstock has significant surface-active properties, measuring 2.8 × 10−6 M in critical micelle concentration with 29.3 mN m−1 surface tension. [ABSTRACT FROM AUTHOR]

Nowadays, eco-friendly extraction techniques are often used to develop natural plant extracts for commercial use. In the current investigation, Greek oregano (Origanum vulgare) phenolic extracts from different cultivated accessions were recovered employing ultrasonic-assisted extraction (UAE), microwave-assisted extraction (MAE), and accelerated solvent extraction (ASE). The phytochemical profile of the oregano extracts, as determined by spectrophotometric and chromatographic techniques, as well as antioxidant activity (ABTS, DPPH, and FRAP assays), was used to compare the three extraction approaches. The results showed that oregano phenolic extracts obtained by MAE held the highest total phenolic content, total flavonoid content, and also a higher content of the main phenolic compounds identified, rosmarinic acid, salvianolic acid B and carvacrol, as determined by LC-MS analysis, followed by those extracted by UAE and ASE. All of the tested extracts exhibited relatively high antioxidant activities, especially the MAE extracts. Oregano extracts produced by various extraction techniques were subjected to a multivariate data analysis to highlight differences in phytochemical profiles, and their correlation to antioxidant activity. According to our findings, it was evident that MAE offers more efficient and effective extraction of bioactive compounds in terms of obtaining phytochemical-rich oregano extracts, with applications in the food and pharmaceutical industries. [ABSTRACT FROM AUTHOR]

Nigella sativa L. seeds and their industrial process products, oils, cake, and meal, are valuable sources of bioactive compounds with antioxidant properties. In this work, the effect of technological processes on the antioxidant capacity (AC) and total phenolic content (TPC) in the black cumin oils obtained by cold pressing and solvent extraction, as well as the by-products, were evaluated. The AC values of black cumin seeds (BCS), cold-pressed black cumin oil (BCCPO), black cumin oil extracted from seeds (BCEO-S), black cumin oil extracted from cake (BCEO-C), black cumin cake (BCC), and black cumin meal (BCM) were determined by 2,2-diphenyl-1-picrylhydrazyl (DPPH) and cupric reducing antioxidant capacity (CUPRAC) assays, whereas TPC in these samples was analyzed by the Folin–Ciocalteu (FC) method. Two applied conventional oil extraction methods, screw pressing and solvent extraction, significantly affected the AC and TPC in the obtained black cumin oils and by-products. The solvent-extracted black cumin oils revealed higher antioxidant properties (DPPH = 4041–16,500 μmol TE/100 g, CUPRAC = 1275–4827 μmol TE/100 g) than the cold-pressed black cumin oil (DPPH = 3451 μmol TE/100 g and CUPRAC = 3475 μmol TE/100 g). In addition, the oil yield (20.92–48.86%) and antioxidant properties of BCCPO (DPPH = 2933–5894 μmol TE/100 g and TPC = 135–199 mg GAE/100 g) and BCC (DPPH = 1890–2265 μmol TE/100 g and TPC = 284–341 mg GAE/100 g) closely depended on the nozzle diameters (5, 8, and 10 mm) mounted in a screw press. Although both by-products were a rich source of antioxidants, BCM had significantly lower CUPRAC (1514 μmol TE/100 g) and TPC (92 mg GAE/100 g) values than BCC (CUPRAC = 3397 μmol TE/100 g and TPC = 426 mg GAE/100 g). Nevertheless, acid hydrolysis and alkaline hydrolysis of BCM extracts significantly increased their antioxidant potential. However, the DPPH (35,629 μmol TE/100 g), CUPRAC (12,601 μmol TE/100 g), and TPC (691 mg GAE/100 g) results were higher for the BCM extract after acid hydrolysis than those for alkaline hydrolysate (DPPH = 2539 μmol TE/100 g, CUPRAC = 5959 μmol TE/100 g, and TPC = 613 mg GAE/100 g). Finally, the generated AGREEprep metrics highlighted the sustainability and the greenness of the cold pressing of oil from BCS. [ABSTRACT FROM AUTHOR]

BACKGROUND: The purification of crude glycerol, a byproduct of biodiesel production and grease trap waste, is essential for its utilization in high‐value applications. Achieving exceptionally pure glycerol without relying on energy‐intensive vacuum distillation during transesterification is of substantial economic interest. RESULTS: This investigation focuses on crafting a purification process involving chemical treatment (neutralization), adsorption and extraction. The assessment of the neutralization process using sodium hydroxide (NaOH) and potassium hydroxide (KOH) revealed their comparative efficacy. Activated carbon adsorption was used to reduce coloration in crude glycerol, with weights set at 4 and 8 wt%. Efficient salt extraction from crude glycerol was explored using solvents such as methanol, ethanol and isopropyl alcohol in varying mass ratios to crude glycerol (1:1 and 2:1). The study also examined the synergistic effects and impact of mixing alcohol solvents. Optimal conditions for achieving high purity (92.44%) were identified as the combination of KOH, 8 wt% activated carbon and a 2:1 ratio of a mixture of the three alcohols. CONCLUSION: The combined effects of employing a mixture of alcohols significantly enhance the extraction process, resulting in the efficient and successful purification of glycerol. These outcomes offer valuable insights into improving the extraction process in industrial settings, leading to the production of high‐quality glycerol products. © 2024 Society of Chemical Industry (SCI). [ABSTRACT FROM AUTHOR]

In recent times, almost 25% of global copper obtained by leaching-cum-solvent extraction routes is considered profitable for the manufacturing of high-quality cathode material. The dissolution kinetics of copper from low-grade goldfieldite ore was examined in ammonia–ammonium sulfate media. In this study, the influences of leachant concentration, reaction temperature, and particle size on goldfieldite ore dissolution were considered. Thus, the experimental results affirmed that the dissolution rate increases steadily with increase in leachant concentration, reaction temperature, and decreasing particle sizes. At established conditions (0.5 mol/L NH3–(NH4)2SO4; 75 °C; and 45 µm), 89.9% dissolution efficiency was achieved within 120 min. The activation energy (Ea) and reaction order calculated to be 34.8 kJ/mol and 1.045 supported the diffusion control mechanism with a first-order relation. Hence, the pregnant leach solution obtained at the optimal leaching conditions was accordingly treated and beneficiated to produce a high-grade copper chloride (CuCl2: 00-348-1947), recommended for various industrial utilities. [ABSTRACT FROM AUTHOR]

Copyright of Nonferrous Metals (Extractive Metallurgy) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A novel solvent extraction system was developed to separate Y3+ from Sr2+, where tributyl phosphate was chosen as an extractant and an organic solvent was a hydrophobic deep eutectic solvent (DES) consisting of oleic acid (OA) and 1‐butyl‐3‐methylimidazolium chloride ([BMIM]Cl). The extraction experiment demonstrated that the extraction system using OA‐[BMIM]Cl DES as an organic solvent exhibited great advantages of fast extraction and excellent selectivity for Y3+ (Y/Sr separation factor >500), which are hardly achieved in the extraction systems using conventional molecular solvent, for example, n‐heptane. Density functional theory calculations also confirmed that the Y/Sr separation is more thermodynamically favorable in OA‐[BMIM]Cl DES as an organic solvent compared to n‐heptane. An extraction process comprising two‐stage extraction, one‐stage scrubbing, and one‐stage stripping was proposed, achieving 95.06% of Y3+ selectively separated from a simulated solution and Y purity of 98.55% in the final product. [ABSTRACT FROM AUTHOR]

The gamma radiolytic degradation behavior of n‐dodecane (n‐DD) was investigated under conditions both with and without the presence of nitric acid. The physicochemical property alterations due to radiolysis were quantified and compared against an unirradiated system. Compositional changes in n‐DD post radiolysis was measured, and the degraded n‐DD was characterized using Fourier‐transform infrared (FT‐IR) spectroscopy, gas chromatography (GC), and gas chromatography–mass spectrometry (GC–MS) analysis. The presence of nitric acid was observed to accelerate the radiolytic degradation of n‐DD. The extent of diluent degradation caused by gamma irradiation was assessed through the retention behavior of uranium [U(VI)], plutonium [Pu(IV)], and zirconium [Zr(IV)] in 1.1 M tri‐n‐butyl phosphate (TBP) in irradiated diluent. Furthermore, the effectiveness of hydrazine carbonate (HC) as a solvent wash reagent for the removal of diluent degradation products was evaluated. [ABSTRACT FROM AUTHOR]

Vegetable oils are extracted from oilseeds, fruits and other parts of plants. The method used in oil extraction is of great importance, as it affects both the quality of the final product and the environment. It is desirable that the extraction method be minimally costly, fast, environmentally friendly, and produce oil of high quality and quantity. Common oil extraction methods are mechanical pressing and solvent extraction, and these methods have advantages and disadvantages over each other. Mechanical extraction and solvent extraction are controversial due to poor product quality and high environmental impacts. This review presents applications where conventional oil extraction processes are assisted by microwave or ultrasound. It is necessary to evaluate the impact of ultrasound and microwave-assisted extraction on the quality of the extracted oil and also to compare the results with those of conventional extraction methods. For this purpose, this review discusses the effects of microwave and ultrasound-assisted extraction on the physicochemical, oxidation indices, bioactive compounds, and antioxidant properties of oil extracted from oil seeds and fruits. Furthermore, this review provides readers with in-depth information on the mechanisms involved, their use, and the impact of operating conditions. The yield and quality of the oil obtained by these processes can vary depending on parameters such as microwave power, ultrasound power, processing time, and temperature. Finally, the review also discusses the challenges and advantages of the industrial application of these technologies. [ABSTRACT FROM AUTHOR]

Toluene solubles (TS) play a crucial role in mesophase pitch (MP), but their influence on the spinnability of MP and the properties of carbon fiber remains unclear. In this work, a solvent extraction method is employed to regulate the TS content in MP for improving its spinnability, and the MPs with different TS contents are prepared. The results show that TS, characterized as a small molecule (IOS = 0.337) with an alkyl side chain length index (Abs1460/Abs1380) of 2.012, can significantly improve the flowability of the system. Following comprehensive characterization, a unique molecular structure model is constructed. The removal of a portion of TS increases the regularity of the microcrystalline structure to a certain extent (d002 = 3.447 Å, Lc = 8.86 nm), further optimizing the spinning performance of compounded MPs with different TS contents, and improving the tensile strength and thermal conductivity of their carbon fibers. The compounded sample MP-TS-17, containing 17 wt% TS, shows superior spinning performance at a high rotary speed of 315 rpm, accompanying with an average and even diameter of 12.60 μm. The carbon fiber derived from MP-TS-17 perform an impressive tensile strength of 2.39 GPa and a high thermal conductivity of 612 W·m−1·K−1. Compared with the carbon fiber from the raw material MP, its mechanical strength and thermal conductivity are improved by 97.4% and 120%, respectively, demonstrating a promising approach for preparing high-performance petroleum-based mesophase pitch carbon fiber. [ABSTRACT FROM AUTHOR]

This study investigates the removal of major impurities, namely Fe, Al, Zn, and Mn, in a solution produced by sulfuric acid leaching of mixed hydroxide precipitate from the Ni and Co via solvent extraction using di(2-ethylhexyl) phosphoric acid (D2EHPA). The results of extraction experiments showed that the extracted Ni, Co, Fe, Al, Zn, Mn, and Mg increased as the equilibrium pH, D2EHPA concentration, and O/A ratio increased. The optimum extraction condition was achieved at a pH of 3.5, a 20% (v/v) D2EHPA concentration, and an O/A ratio of 1, with a complete (>99.9%) extraction of Al, Fe, Zn, and 97.33% Mn with co-extracted Ni and Co of 22.32% and 29.13%, respectively, in a single extraction stage. Complete Mn removal can be achieved in two extraction stages. Co-extracted Ni and Co can be scrubbed out using a mild sulfuric acid solution at a pH of 1.2 with only less than 2% of the Al, Fe, Zn, and Mn co-scrubbed. McCabe-Thiele diagrams of the scrubbing processes were constructed, and the results showed that Ni and Co can be scrubbed out using a mild acidic solution at a pH of 1.2, O/A ratio of 1, and temperature of 40°C for 10 min of mixing. Zn and Mn can be stripped completely using 0.5 M sulfuric acid solution at an O/A of 1 and temperature of 40°C for 10 min of mixing, while Fe and Al remained unstripped. Fe and Al can subsequently be stripped via reductive stripping. [ABSTRACT FROM AUTHOR]

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This study aimed to determine the effectiveness of different green extraction techniques (GETs) on targeted bioactive compounds from artichoke leaf by-products using deep eutectic solvent extraction (DESE), supercritical CO2 extraction (SCO2E), subcritical water extraction (SWE), and ultrasound-assisted extraction (UAE). Moreover, (HR) LC-ESI-QTOF MS/MS and HPLC-PDA analyses were used to perform qualitative–quantitative analysis on the extracts, enabling the detection of several bioactive compounds, including luteolin, luteolin 7-O-glucoside, luteolin 7-O-rutinoside, apigenin rutinoside, chlorogenic acid, and cynaropicrin as the most representative ones. SWE showed better results than the other GETs (TPC: 23.39 ± 1.87 mg/g of dry plant, dp) and appeared to be the best choice. Regarding UAE, the highest total phenols content (TPC) was obtained with 50:50% v/v ethanol: water (7.22 ± 0.58 mg/g dp). The DES obtained with choline chloride:levulinic acid showed the highest TPC (9.69 ± 0.87 mg/g dp). Meanwhile, SCO2E was a selective technique for the recovery of cynaropicrin (48.33 ± 2.42 mg/g dp). Furthermore, the study examined the antioxidant activity (1.10–8.82 mmol Fe2+/g dp and 3.37–31.12 mmol TEAC/g dp for DPPH• and FRAP, respectively) and total phenols content via Folin–Ciocalteu's assay (198.32–1433.32 mg GAE/g dp), of which the highest values were detected in the SWE extracts. The relationship among the GETs, antioxidant assays, and compounds detected was evaluated using Principal Component Analysis (PCA). PCA confirmed the strong antioxidant activity of SWE and showed comparable extraction yields for the antioxidant compounds between UAE and DESE. Consequently, GETs selection and extraction parameters optimization can be employed to enrich artichoke leaf by-products' extracts with targeted bioactive compounds. [ABSTRACT FROM AUTHOR]

The document is a contents list for the journal "Dalton Transactions: An International Journal of Inorganic Chemistry," published by The Royal Society of Chemistry. It includes various articles on topics such as metal bonding, luminescence changes, nanocomposites, and catalysis. The journal aims to connect the world with the chemical sciences and invest profits back into the chemistry community. [Extracted from the article]

This review examines recent technological developments for recovering critical metals from mining and metallurgical waste streams, focusing on Co, Ga, Ge, In, Li, Ni, Re, Te, Sn, W, and V. Novel approaches using electrochemical methods, membranes, solvent extraction, and biomining are critically evaluated for their effectiveness and potential for industrial adoption. Key competitive advantages of these technologies are discussed, along with aspects requiring further research, such as process control, fouling issues, and microbial stability. The exploration of integrated and hybrid solutions combining different technologies is a potential game-changer for technology transfer. Finally, while these novel approaches show promise, further research is needed to overcome challenges related to cost, process control, and scalability. Addressing these issues is crucial for successfully transitioning these technologies from laboratory-scale experiments to industrial applications. By overcoming these hurdles, the mining and metallurgy sector can play a vital role in supplying critical metals for the zero-carbon transition while reducing its environmental impact and advancing toward a circular economy. [ABSTRACT FROM AUTHOR]

Highly efficient and selective extraction of silver ions from wastewater remains a formidable challenge in ensuring public health and protecting ecosystems. Herein, an acyl-based thiourea extractant known as N-benzoyl-N′,N′-dibutyl thiourea (BDBTU) was used for the selective extraction of silver ions from aqueous solution by a solvent extraction method. BDBTU displayed an outstanding extraction efficiency of Ag(I) with an extraction ratio of 96.7% under the optimal extraction conditions, surpassing its effectiveness for Cu(II) and Mn(II) ions. In addition, BDBTU retained high effectiveness even after undergoing eight regeneration cycles, with only a slight decrease in the extraction efficiency from 96.7% to 95.2%. Moreover, it displayed selective extraction towards Ag(I) ions under the interference of metal ions (i.e., Cu(II), Pb(II), Mn(II), Zn(II), Ni(II), Co(II) and Na(I)). The investigation into the extraction mechanism of BDBTU towards Ag(I) unveiled that BDBTU provided a high affinity for Ag(I) accompanied by the formation of Ag–O–C and Ag–S–C bonds. These results indicated that the exceptional extraction stability and selectivity of BDBTU offer promising prospects for diverse applications, highlighting its potential in silver-containing wastewater treatment fields. [ABSTRACT FROM AUTHOR]

Rationale: Ethylene oxide (EO) sterilization is commonly employed for the sterilization of medical devices and has a very high market share. However, EO and its metabolite ethylene chlorohydrin (ECH) are toxic to humans. In compliance with the classification and residue limits of medical devices defined by ISO 10993‐7, our study established two extraction methods for the testing of EO and ECH. Methods: The first method involves simulated‐use extraction using water as the extraction solvent. While the second, exhaustive extraction, directly extracts sample through headspace sampling analysis. Gas chromatography–tandem mass spectrometry in multiple reaction monitoring mode was utilized, requiring only 16 min. Then, the developed method was applied to assess 10 commercially available medical devices sterilized by EO. Results: In simulated‐use extraction, calibration curves were evaluated in the range of 1–100 and 5–500 μg for EO and ECH, respectively (r > 0.999). Inter‐day recoveries ranged from 85.0% to 95.2% and from 94.8% to 102.4%. In exhaustive extraction, calibration curves spanned 0.5–50 and 2–200 μg for EO and ECH, respectively (r > 0.999). Inter‐day recoveries ranged from 101.6% to 102.1% for EO and from 98.1% to 102.2% for ECH. After analysis of the 10 commercially available medical devices, two cotton swabs were found to have ECH of 35.1 and 28.4 μg per device, and four medical devices were found to have EO with concentration below the limit of quantification. Meanwhile, we found that the EO internal standard (propylene oxide) recommended by ISO 10993‐7 had interference problems with other similar substances and was not suitable as an internal standard for EO. Conclusions: This study offers a sensitive and straightforward analytical approach to EO and ECH residues in a variety of medical devices. In addition, the results show that the EO or ECH content of these types of medical devices in our study falls below the regulatory limits, therefore instilling confidence among consumers regarding their safe use. [ABSTRACT FROM AUTHOR]

Copyright of Food & Fermentation Industries is the property of Food & Fermentation Industries and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Dental caries is the most widespread form of disease, affecting over 90% of the global population. Amalgam fillings, which have been in use for nearly two centuries, will face an European Union ban by 2025. Although photocomposite fillings are a suitable alternative, health concerns persist because of potential substance release into the oral cavity. This study aimed to evaluate the release of photoinitiator substances and monomers from dental materials into various solvents at different temperatures over 30 days. Cylindrical specimens of the composite resins were submerged in different extraction solutions and incubated at 37 and 50°C. The findings demonstrated that both the extraction solvent and extraction temperature significantly influenced the quantity of leachables (p < 0.05). Furthermore, most leachables were released within the initial days, although some monomers continued to elute for over 30 days. The estimated daily intake was calculated for the worst‐case scenario, confirming the biocompatibility of the composite fillings. The weight loss of dental materials ranged up to 3.5% after 30 days, regardless of the extraction conditions and dental material (p > 0.05). In conclusion, this study contributes to filling several research gaps in the field by addressing the biocompatibility of various dental materials through quantitative and qualitative analyses supported by statistical evaluation. [ABSTRACT FROM AUTHOR]