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Food Chem

Title:		Analysis of volatile thiols in alcoholic beverages by simultaneous derivatization/extraction and liquid chromatography-high resolution mass spectrometry
Author(s):		Vichi S; Cortes-Francisco N; Caixach J;
Address:		"Food Science and Nutrition Department, XaRTA (Catalonian Reference Network on Food Technology), University of Barcelona, Food and Nutrition Torribera Campus, Av. Prat de la Riba, 171, 08921 S.ta Coloma de Gramenet, Spain. Electronic address: stefaniavichi@ub.edu. Food Science and Nutrition Department, XaRTA (Catalonian Reference Network on Food Technology), University of Barcelona, Food and Nutrition Torribera Campus, Av. Prat de la Riba, 171, 08921 S.ta Coloma de Gramenet, Spain. Mass Spectrometry Laboratory/Organic Pollutants, IDAEA-CSIC, Jordi Girona, 18-26, 08034 Barcelona, Spain"
Journal Title:		Food Chem
Year:		2015
Volume:		20141128
Issue:
Page Number:		401 - 408
DOI:		10.1016/j.foodchem.2014.11.095
ISSN/ISBN:		1873-7072 (Electronic) 0308-8146 (Linking)
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 analyzed. 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"
Keywords:		"Alcoholic Beverages/*analysis Chromatography, Liquid/*methods Sulfhydryl Compounds/analysis/*chemistry Tandem Mass Spectrometry/*methods Volatilization Beer Derivatization Hrms/ms High resolution mass spectrometry (HRMS) Orbitrap Thiols Wine;"
Notes:		"MedlineVichi, Stefania Cortes-Francisco, Nuria Caixach, Josep eng Research Support, Non-U.S. Gov't England 2015/01/13 Food Chem. 2015 May 15; 175:401-8. doi: 10.1016/j.foodchem.2014.11.095. Epub 2014 Nov 28"