Simultaneous determination of E-2-nonenal and β-damascenone in beer by reversed-phase liquid chromatography with UV detection

被引:29
作者
Guido, LF [1 ]
Carneiro, JR [1 ]
Santos, JR [1 ]
Almeida, PJ [1 ]
Rodrigues, JA [1 ]
Barros, AA [1 ]
机构
[1] Univ Porto, Ctr Invest Quim, Fac Ciencias, Dept Quim, P-4169007 Oporto, Portugal
关键词
beer; food analysis; nonenal; damascenone; carbonyl compounds;
D O I
10.1016/j.chroma.2003.12.026
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
A method for the simultaneous determination of E-2-nonenal and beta-damascenone in beer by reversed-phase liquid chromatography using UV detection is presented. The method consists of beer steam distillation, followed by an extraction/concentration step using Sep-Pak Plus C-18 RP cartridges and determination by HPLC at 226 nm UV-absorption maximum. The identity of the compounds was confirmed by GC analysis with MS detection of the isolated fractions. A recovery factor of approximately 80% was obtained for beta-damascenone with a R.S.D. of 3%. E-2-Nonenal and beta-damascenone were monitored in a comparative study of fresh and either naturally and forced aged beer. The results obtained show that both compounds have a similar behaviour through an extended storage of beer and consequently can be used as good analytical markers of beer ageing. Nevertheless, the use of beta-damascenone seems to be more convenient because this compound appears in beer in higher concentrations than E-2-nonenal, thus making it easier to measure. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:17 / 22
页数:6
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