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Title: Analysis of volatile thiols in alcoholic beverages by simultaneous derivatization/extraction and liquid chromatography-high resolution mass spectrometry
Author: Vichi, S. (Stefania)
Cortés Francisco, Nuria
Caixach Gamisans, Josep
Keywords: Vi
Química dels aliments
Espectrometria de masses
Food composition
Mass spectrometry
Issue Date: 28-Nov-2014
Publisher: Elsevier B.V.
Abstract: A simultaneous derivatization/extraction method followed by liquid chromatography electrospray-high resolution mass spectrometry for the determination of volatile thiols in hydroalcoholic matrixes was optimized and used to identify and quantify volatile thiols in wine and beer samples. The method was evaluated in terms of sensitivity, precision, accuracy and selectivity. The experimental LOQs of eleven thiols tested ranged between 0.01 ng/L and 10 ng/L. Intra-day relative standard deviation (RSD) was in general lower than 10% and inter-day RSD ranged between 10% and 30%. Recovery in the model and real matrixes ranged from 45% to 129%. The method was then applied for the analysis of four white wines and six beers. Five out of the eleven reference thiols were identified and quantified in the samples analysed. The non-target approach, carried out by monitoring the diagnostic ion at m/z 275.9922 [C13H10ONSe]+ in the fragmentation spectrum, allowed detecting, in the same samples, fourteen non-target thiols.
Note: Versió postprint del document publicat a:
It is part of: Food Chemistry, 2014, vol. 175, p. 401-408
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ISSN: 0308-8146
Appears in Collections:Articles publicats en revistes (Nutrició, Ciències de l'Alimentació i Gastronomia)

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