期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1035, 期 1, 页码 123-130出版社
ELSEVIER
DOI: 10.1016/j.chroma.2004.02.037
关键词
cereals; acrylamide
A quantitative method has been developed for the determination of trace levels (<50 mug/kg) of acrylamide in cereal-based foods. The method is based on extraction of acrylamide with water, acidification and purification with Carrez I and 11 solutions, followed by bromination of the acrylamide double bond. The reaction product (2,3-dibromopropionamide) is extracted with ethyl acetate/hexane (4: 1, v/v), dried over sodium sulfate, and cleaned up through a Florisil column. The derivative is then converted to 2-bromopropenamide by dehydrobromination with triethylamine and analyzed by gas chromatography coupled to mass spectrometry (GC-MS), employing (C-13(3))acrylamide as internal standard. In-house validation data for commercial and experimental cereal products showed good precision of the method, with repeatability and intermediate reproducibility relative standard deviations below 10%. The limit of detection and limit of quantitation are estimated at 2 and 5 mug/kg, respectively, and recoveries of acrylamide from samples spiked at levels of 5-500 mug/kg ranged between 93 and 104% after correction of analyte loss by the internal standard. Finally, a comparative test organized with two independent laboratories provided additional confidence in the good performance of the method, particularly at very low concentration levels. (C) 2004 Elsevier B.V. All rights reserved.
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