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In the last two decades, the introduction of tandem mass spectrometry in clinical laboratories has enabled simultaneous testing of numerous acylcarnitines and amino acids from dried blood spots for detecting many aminoacidopathies, organic acidurias and fatty acid oxidation disorders. The expanded newborn screening was introduced in Slovenia in September 2018. Seventeen metabolic diseases have been added to the pre-existing screening panel for congenital hypothyroidism and phenylketonuria, and the newborn screening program was substantially reorganized and upgraded.

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Background and Aims Pyranoanthocyanins are a type of derivative formed by the cycloaddition reaction of different compounds with anthocyanins during wine maturation and ageing, and show a characteristic pyranic ring. This ring provides a high stability to the pigment, and the ring does not fragment in mass spectrometric experiments. Thus, aglycone ions of these derivatives in tandem mass spectrometry show the same fragmentation pattern as that of the corresponding precursor anthocyanin. The aim of this work was the identification of pyranoanthocyanins present in Rioja aged wines using mass spectrometric features to differentiate among isomeric compounds. Methods and Results The application to three Rioja aged red wines of a methodology that combines column chromatography, solid-phase extraction and high-performance liquid chromatography-diode array detection-electrospray ionisation collision-induced dissociation-tandem mass spectrometry has allowed the identification of 72 pyranoanthocyanin derivatives. Conclusions This paper provides an overview of pyranoanthocyanin derivatives present in aged red wines with the identification of 72 compounds, some of them derivatives that appear in low concentration, and it assesses the importance of mass spectrometric analysis in the differentiation among isomeric derivatives. Significance of the Study The methodology described allows the identification of derivatives at low concentration and the establishment of characteristic fingerprints of native anthocyanins, which provide an effective tool for pyranoanthocyanin identification, allowing the differentiation among isomeric derivatives. [ABSTRACT FROM AUTHOR]

A simple, reliable, and fast multiresidue method has been developed for the determination of 17 veterinary drugs belonging to several families (macrolides, sulfonamides, and anthelmintics) in cheese at trace levels. Ultra-high-performance LC coupled to MS/ MS has been used for the analysis of these compounds in less than 9 min. Veterinary drug residues have been extracted from cheese samples using a Qu ECh ERS (quick, easy, cheap, effective, rugged, and safe)-based extraction procedure without applying any further clean-up step. Matrix-matched calibration was used for quantification and recoveries were calculated at three concentration levels (10, 50, and 100 μg/kg). The obtained values ranged from 70 to 110% for the selected compounds except for tylosin and josamycin at 100 μg/kg (111.7 and 112.7%, respectively). Intra- and interday precision were also evaluated and RSDs were lower than 25% in all the cases. LOQs ranged from 0.3 μg/kg (for thiabendazole, oxfendazole, mebendazole, josamycin, and fenbendazole) to 10.5 μg/kg (abamectin), whereas decision limit and detection capability ranged from 2.3 (thiabendazole) to 11.3 (abamectin) and 4.2 (thiabendazole) to 14.3 μg/kg (abamectin), respectively. Finally, 13 samples were analyzed and traces of thiabendazole were detected in two different cheeses. [ABSTRACT FROM AUTHOR]