Journal
FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT
Volume 31, Issue 5, Pages 932-939Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/19440049.2014.900572
Keywords
aflatoxin; mass spectrometry; mycotoxin
Funding
- Ministry of Agriculture of the People's Republic of China [2011-G5(3)]
- Science and Technology Department of Henan Province [112101110400]
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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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