Evaluation of beer deterioration by gas chromatography-mass spectrometry/multivariate analysis: A rapid tool for assessing beer composition
authors Rodrigues, JA; Barros, AS; Carvalho, B; Brandao, T; Gil, AM; Ferreira, ACS
nationality International
journal JOURNAL OF CHROMATOGRAPHY A
author keywords Beer; Forced aging; Volatile signature; Gas chromatography-mass spectrometry (GC-MS); Principal Component Analysis (PCA)
keywords FURFURYL ETHYL ETHER; BETA-DAMASCENONE; FLAVOR STABILITY; LIQUID-CHROMATOGRAPHY; DIMETHYL TRISULFIDE; REDUCING POWER; UV DETECTION; LAGER BEER; PH; SPECTROMETRY
abstract Beer stability is a major concern for the brewing industry, as beer characteristics may be subject to significant changes during storage. This paper describes a novel non-targeted methodology for monitoring the chemical changes occurring in a lager beer exposed to accelerated aging (induced by thermal treatment: 18 days at 45 degrees C), using gas chromatography-mass spectrometry in tandem with multivariate analysis (GC-MS/MVA). Optimization of the chromatographic run was performed, achieving a threefold reduction of the chromatographic time. Although losing optimum resolution, rapid GC runs showed similar chromatographic profiles and semi-quantitative ability to characterize volatile compounds. To evaluate the variations on the global volatile signature (chromatographic profile and m/z pattern of fragmentation in each scan) of beer during thermal deterioration, a non-supervised multivariate analysis method, Principal Component Analysis (PCA), was applied to the GC-MS data. This methodology allowed not only the rapid identification of the degree of deterioration affecting beer, but also the identification of specific compounds of relevance to the thermal deterioration process of beer, both well established markers such as 5-hydroxymethylfufural (5-HMF), furfural and diethyl succinate, as well as other compounds, to our knowledge, newly correlated to beer aging. (C) 2010 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0021-9673
year published 2011
volume 1218
issue 7
beginning page 990
ending page 996
digital object identifier (doi) 10.1016/j.chroma.2010.12.088
web of science category Biochemical Research Methods; Chemistry, Analytical
subject category Biochemistry & Molecular Biology; Chemistry
unique article identifier WOS:000287281200014
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journal impact factor 3.716
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