Determination of the aflatoxin AFB1 from corn by direct analysis in real time-mass spectrometry (DART-MS)

文献类型： 外文期刊

第一作者： Busman, Mark

作者： Busman, Mark;Bobell, John R.;Maragos, Chris M.;Liu, Jihong;Zhong, Hongjian

作者机构：

关键词： aflatoxin;mass spectrometry;mycotoxin

期刊名称：FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT （ 影响因子：3.057； 五年影响因子：2.96 ）

ISSN： 1944-0049

年卷期： 2014 年 31 卷 5 期

页码：

收录情况： SCI

摘要： Direct analysis in real time (DART) ionisation coupled to a high-resolution mass spectrometer (MS) was used for screening of aflatoxins from a variety of surfaces and the rapid quantitative analysis of a common form of aflatoxin, AFB1, extracted from corn. Sample preparation procedure and instrument parameter settings were optimised to obtain sensitive and accurate determination of aflatoxin AFB1. 84:16 acetonitrile water extracts of corn were analysed by DART-MS. The lowest calibration level (LCL) for aflatoxin AFB1 was 4 mu gkg(-1). Quantitative analysis was performed with the use of matrix-matched standards employing the C-13-labelled internal standard for AFB1. DART-MS of spiked corn extracts gave linear response in the range 4-1000 mu gkg(-1). Good recoveries (94-110%) and repeatabilities (RSD=0.7-6.9%) were obtained at spiking levels of 20 and 100 mu gkg(-1) with the use of an isotope dilution technique. Trueness of data obtained for AFB1 in maize by DART-MS was demonstrated by analysis of corn certified reference materials.

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