Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1190, Issue 1-2, Pages 342-349Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2008.03.015
Keywords
beer; flavour stability; solid-phase microextraction; on-fibre derivatisation; gas chromatography; mass spectrometry
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Headspace solid-phase microextraction combined with gas chromatography and mass spectrometry was used for the quantification of 32 volatiles which represent the typical chemical reactions that can occur during beer ageing. Detection was accomplished by employing on-fibre derivatisation using o-(2,3,4,5,6-pentafluorobenzyl)hydroxylamine (PFBHA) and normal HS-SPME extraction. The procedures were optimised for SPME fibre selection, PFBHA loading temperature and time, extraction temperature and time, and effect of salt addition. Interference of matrix effects was overcome by calibrating according to the standard addition method and by using internal standards. Afterwards, the method was validated successfully and was applied to study the flavour stability of different beer types. (C) 2008 Elsevier B.V. All rights reserved.
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