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Start Over Author "alessandra ciampa" Journal journal of food quality
2 results on '"alessandra ciampa"'

1. Validation of a 1H-NMR Spectroscopy Quantitative Method to Quantify Trimethylamine Content and K-Index Value in Different Species of Fish

Author

Alessandra Ciampa, Luca Laghi, and Gianfranco Picone

Subjects
Nutrition. Foods and food supply, TX341-641
Abstract

The chemical analysis that is frequently employed for the evaluation of the freshness of fish includes (i) the quantification of trimethylamine (TMA) and (ii) the estimation of the K-Index, based on the ratio between the concentrations of adenosine triphosphate (ATP) and its breakdown products. TMA is quantified using a colorimetric reference method (AOAC), while the K-Index is usually determined by HPLC. The present work proposes a method for the above freshness biomarkers based on HR 1H-NMR as an alternative method able to assess both indexes simultaneously on aqueous fish extracts. To validate the proposed 1H-NMR method, a large set of validation checks has been addressed, such as accuracy, precision, specificity, limits of detection, linearity, and range of linearity and quantification according to EuroChem guidelines. The results show that the methodology satisfies all the validation requirements at the same level as the most frequently used methods, with the advantage of being faster and more repeatable, avoiding the use of solvents, such as toluene and formaldehyde, or dangerous reagents such as picric acid.

Published
2022
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2. ARSENIC CONTAMINATION IN RADISH TUBER INVESTIGATED BY MEANS OF MRI AND ICP OES

Author

Paolo Sequi, Claudio Beni, Ulderico Neri, Giampietro Diana, Alessandra Ciampa, Massimiliano Valentini, Rita Aromolo, and Simona Marconi

Subjects
biology, food and beverages, Raphanus, chemistry.chemical_element, Contamination, biology.organism_classification, Arsenic contamination of groundwater, Food chain, chemistry, Agronomy, Inductively coupled plasma atomic emission spectroscopy, Environmental chemistry, Safety, Risk, Reliability and Quality, Arsenic, Legume, Food Science, Food contaminant
Abstract

Arsenic (As) is a highly toxic element and its presence in food is a matter of concern for the well-being of both animals and humans. Arsenic-contaminated groundwater is used in agriculture to irrigate crops for food and animal consumption with a potential contamination of the food chain. The purpose of this study was the evaluation of arsenic effect on radish tuber (Raphanus sativus L.). Experimental plots with sandy and clay-loamy soil were cultivated with radish and treated with three different concentrations of As water solution: 19, 44 and 104 µg/L. Magnetic resonance imaging was used to visualize the tuber structural changes, and the content of elements and the As amount were evaluated by inductively coupled plasma atomic emission spectroscopy. The data obtained demonstrate that As contamination in radish tuber is underlined with the dual approach. PRACTICAL APPLICATIONS The scope of this research is the evaluation of the effects on the toxicology and the morphology because of the arsenic (As) uptake by edible plants. The focus is on the contamination of the plant, which has implications for food safety and human health. The results obtained by magnetic resonance imaging and inductively coupled plasma atomic emission spectroscopy show that several changes of the internal structure occurred and that some parameters can be used as indicators of the As contamination in food.

Published
2010
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