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DOI10.1016/j.chroma.2017.07.085
Accurate determination of 3-alkyl-2-methoxypyrazines in wines by gas chromatography quadrupole time-of-flight tandem mass spectrometry following solid-phase extraction and dispersive liquid-liquid microextraction
Fontana, Ariel1; Rodriguez, Isaac2; Cela, Rafael2
通讯作者Fontana, Ariel
来源期刊JOURNAL OF CHROMATOGRAPHY A
ISSN0021-9673
EISSN1873-3778
出版年2017
卷号1515页码:30-36
英文摘要

A new reliable method for the determination 3-alkyl-2-methoxypyrazines (MPs) in wine samples based on the sequential combination of solid-phase extraction (SPE), dispersive liquid-liquid microextraction (DLLME) and gas chromatography (GC) quadrupole time-of-flight accurate tandem mass spectrometry (QTOF-MS/MS) is presented. Primary extraction of target analytes was carried out by using a reversed phase Oasis HLB (200 mg) SPE cartridge combined with acetonitrile as elution solvent. Afterwards, the SPE extract was submitted to DLLME concentration using 0.06 mL carbon tetrachloride (CCl4) as extractant. Under final working conditions, sample concentration factors above 379 times and limits of quantification (LOQs) between 03 and 2.1 ng L-1 were achieved. Moreover, the overall extraction efficiency of the method was unaffected by the particular characteristics of each wine; thus, accurate results (relative recoveries from 84 to 108% for samples spiked at concentrations from 5 to 25 ng L-1) were obtained using matrix-matched standards, without using standard additions over every sample. Highly selective chromatographic records were achieved considering a mass window of 5 mDa, centered in the quantification product ion corresponding to each compound. Twelve commercial wines, elaborated with grapes from different varieties and geographical origins, were processed with the optimized method. The 2-isobutyl-3-methoxypyrazine (1BMP) was determined at levels above the LOQs of the method in half of the samples. (C) 2017 Elsevier B.V. All rights reserved.


英文关键词Methoxypyrazines Wine analysis Dispersive liquid-liquid microextraction Solid-phase extraction Gas chromatography time-of-flight mass spectrometry
类型Article
语种英语
国家Argentina ; Spain
收录类别SCI-E
WOS记录号WOS:000411536400004
WOS关键词SAUVIGNON BLANC WINE ; METHOXYPYRAZINE ANALYSIS ; QUANTITATIVE-ANALYSIS ; LIGHT EXPOSURE ; LEAF REMOVAL ; RED WINES ; GRAPES ; MS/MS ; ACCUMULATION ; AROMA
WOS类目Biochemical Research Methods ; Chemistry, Analytical
WOS研究方向Biochemistry & Molecular Biology ; Chemistry
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/200253
作者单位1.Univ Nacl Cuyo, Consejo Nacl Invest Cient & Tecn, Inst Biol Agr Mendoza, Lab Bioquim Vegetal, Almirante Brown 500,M5528AHB, Chacras De Coria, Argentina;
2.Univ Santiago de Compostela, IIAA, Dept Quim Analit Nutr & Bromatol, Santiago De Compostela 15782, Spain
推荐引用方式
GB/T 7714
Fontana, Ariel,Rodriguez, Isaac,Cela, Rafael. Accurate determination of 3-alkyl-2-methoxypyrazines in wines by gas chromatography quadrupole time-of-flight tandem mass spectrometry following solid-phase extraction and dispersive liquid-liquid microextraction[J],2017,1515:30-36.
APA Fontana, Ariel,Rodriguez, Isaac,&Cela, Rafael.(2017).Accurate determination of 3-alkyl-2-methoxypyrazines in wines by gas chromatography quadrupole time-of-flight tandem mass spectrometry following solid-phase extraction and dispersive liquid-liquid microextraction.JOURNAL OF CHROMATOGRAPHY A,1515,30-36.
MLA Fontana, Ariel,et al."Accurate determination of 3-alkyl-2-methoxypyrazines in wines by gas chromatography quadrupole time-of-flight tandem mass spectrometry following solid-phase extraction and dispersive liquid-liquid microextraction".JOURNAL OF CHROMATOGRAPHY A 1515(2017):30-36.
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