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Abstract: Objective To establish a method for the determination of methamidophos residue in spiked ginger by molecular imprinting method. Methods The methamidophos in ginger were isolated and enriched with the method of molecularly imprinted-solid phase extraction, and the method of liquid chromatography was used for quantitative analysis. The molecularly imprinted polymer (MIP) was synthesized by precipitation polymerization method while methamidophos was used as the template, α-methacrylic acid was monomer, and trimethyl-propane trimethacrylate was crosslinking agent, and their feeding molar ratio was 1:8:40. Results The static adsorption experiment data showed that the adsorption was balanced at 10 min. The adsorption rate of methamidophos was higher than 80%. The imprinting factor was 2.105, and the maximum apparent adsorption capacity of the imprinted polymer was 3.24 μmol/g. The average adding recovery rate of raw ginger juice was higher than 86.4%, and the relative standard deviation was less than 4.5% (n=6). Conclusion This method can be used for the detection of methamidophos in spiked ginger containing sulfhydryl compounds.
Template and target information: methamidophos
Author keywords: molecularly imprinted technique, solid-phase exrtraction, Methamidophos, spiked ginger