Liquid chromatographic-mass spectrometric determination of genistin and daidzin in soybean food samples after accelerated solvent extraction with modified content of extraction cell

被引:51
作者
Klejdus, B [1 ]
Mikelová, R [1 ]
Adam, V [1 ]
Zehnálek, J [1 ]
Vacek, J [1 ]
Kizek, R [1 ]
Kubán, V [1 ]
机构
[1] Mendel Univ Brno, Dept Chem & Biochem, CZ-61300 Brno, Czech Republic
关键词
accelerated solvent extraction; solvent extraction; ultrasonic extraction; Soxhlet extraction; high-performance liquid chromatography; UV spectrophotometric detection; mass spectrometry; isoflavones; daidzin; genistin; soybean food; foodstuffs;
D O I
10.1016/j.aca.2004.05.003
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A newly elaborated accelerated solvent extraction (ASE) procedure allowed more accurate (<2%) and precise (<5-8% rel.) HPLC/UV/MS determination of isoflavones in different kinds of food made from soybean (products of ecological agriculture), i.e. soy farina, soy meat granulate, soy meat laminae, soy meat bits, Protmix and EKO-B1. The on-column limits of detection (LOD) for daidzin/genistin were 1.2/1.6 fmol for the signal-to-noise ratio S/N = 3 and 1-3 fmol for daidzem, genistein, formononetin, biochanin A and ononin, respectively. Final concentrations of daidzin in soybean foods fluctuated between 30 and 60 mug/g of dry matter (DM). Significantly higher concentrations of genistin (between 60 and 130 mug/g DM) were found in the soybean foods. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:1 / 11
页数:11
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