期刊
FOOD CHEMISTRY
卷 196, 期 -, 页码 292-300出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2015.09.018
关键词
Hollow fiber supported liquid membrane; Dispersive liquid-liquid microextraction; Soybean juice; Aflatoxins; Sample preparation
资金
- Brazilian Government Agency Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
This study describes a combination between hollow fiber membrane and dispersive liquid-liquid microextraction for determination of aflatoxins in soybean juice by HPLC. The main advantage of this approach is the use of non-chlorinated solvent and small amounts of organic solvents. The optimum extraction conditions were 1-octanol as immobilized solvent; toluene and acetone at 1:5 ratio as extraction and disperser solvents (100 mu L), NaCl at 2% of the sample volume and extraction time of 60 min. The optimal condition for the liquid desorption was 150 mu L acetonitrile:water (50:50 v/v) and desorption time of 20 min. The linear range varied from 0.03 to 21 mu g L-1, with R-2 coefficients ranging from 0.9940 to 0.9995. The limits of detection and quantification ranged from 0.01 mu g L-1 to 0.03 mu g L-1 and from 0.03 mu g L-1 to 0.1 mu g L-1, respectively. Recovery tests ranged from 72% to 117% and accuracy between 12% and 18%. (C) 2015 Elsevier Ltd. All rights reserved.
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