Development of method for screening and quantification of some contaminants in rice

Liquid chromatography - high resolution mass spectrometry (LC-HRMS) developed to screen some residues in rice. Pesticides, aflatoxin B1, B2, G1, aflatoxin G2 and quaternary ammonium surfactants were detected by the optimized method. Rice samples extracted cleaned QuEChERS then analyzed QExactive system with HESI ionization source for both negative positive modes. The C18 reversed phase column was used mobile consists of water Methanol containing 0.1% formic acid 10 mM formate. The method applied successfully to analyze 60 rice collected Hanoi city. results showed that 5 pesticides 30 from 10.3 160 µg/kg.