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Hyphenated Gas Chromatography-Mass Spectrometry Analysis of 3-mercaptohexan-1-ol and 3-mercaptohexyl Acetate in Wine: Comparison With Results of Other Sampling Procedures via a Robust Regression

Hyphenated Gas Chromatography-Mass Spectrometry Analysis of 3-mercaptohexan-1-ol and 3-mercaptohexyl Acetate in Wine: Comparison With Results of Other Sampling Procedures via a Robust Regression

Bruno Fedrizzi, Giuseppe Versini, Irma Lavagnini, Denis Badocco, Giorgio Nicolini, Franco Magno

Anal Chim Acta. 2008 Jul 21;621(1):38-43.

PMID: 18573368

Abstract:

This work describes a new purge and trap gas chromatography electron impact mass spectrometry (PT-GC-EIMS) method for quantifying 3-mercaptohexan-1-ol (3-MH) and 3-mercaptohexyl acetate (3-MHA), two molecules able to characterize some wines with their tropical scents. Firstly the experimental conditions of the purge and trap extraction (sample temperature, extraction time, trap temperature, flow rate) following a multivariate approach were optimized. Then the method through the construction of the calibration curves and the establishment of the detection limits was validated. The purge and trap procedure appears faster and more sensitive than both the headspace solid phase microextraction (HS-SPME) and the solid phase extraction (SPE) procedures, reaching detection limits for the two thiols closer to their sensory thresholds. Evidence of similar performances of the three sampling methods considered was gained comparing the results relevant to same wine samples. The Theil's regression method was used for purpose of comparison.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
IAR42140	Gas Chromatography PT			Price

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