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

作者：Busman Mark^*; Liu Jihong; Zhong Hongjian; Bobell John R; Maragos Chris M

来源：Food Additives and Contaminants Part A-Chemistry Analysis Control Exposure& Risk Assessment, 2014, 31(5): 932-939.

DOI：10.1080/19440049.2014.900572

• aflatoxin
• mass spectrometry
• mycotoxin

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.

• 出版日期2014-5-4
• 单位河南省农业科学院