Determination of 26 sulfonylurea residues in soil by liquid chromatography-tandem mass spectrometry
In this paper,the residues of 26 sulfonylurea in soil were taken as the research object.The samples were extracted by 1% acetic acid in acetonitrile,and purified by molecular imprinting column,determined by LC-MS/MS multi-reaction monitoring positive/negative ion mode,and quantified by external standard method.It showed a good linear relationship in the concentration range of 2.5～100 ng/mL.The recoveries of sulfonylureas in soil were 72.62%-119.24% within the range of four addition levels(0.5,1,2,50µg/kg),and the relative standard deviations were 3.07%～11.19%,the limit of quantification(LOQ)was 0.5µg/kg.
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