Determination of Four Carbamate Pesticide Residues in Poria cocos by HPLC-MS
Objective:To establish a method for the detection of carbamate pesticides in Poria cocos by QuEChERS sample preparation combined with high performance liquid chromatography tandem mass spectrometry.Method:Poria cocos samples were extracted with acetonitrile solution containing 1%acetic acid,salting out agent and then salting out with MgSO4,PSA and C18 were added for extraction and purification,detected by high performance liquid chromatography tandem mass spectrometry,qualitative according to the retention time and characteristic ion pairing of chromatographic peaks,and quantified by matrix matching standard curve.Result:In 2.0～100.0 μg·L-1,the correlation coefficient was good,R2＞0.998;when the addition levels of 0.015 mg·kg-1,0.060 mg·kg-1 and 0.600 mg·kg-1,the recoveries were 77.3%～117.2%,the relative standard deviation was 0.2%～3.1%(n=6);the detection limit was 0.60～1.00 μg·kg-1.Conclusion:This method has high accuracy,sensitivity,efficiency and rapidity,and can be used for quality control of four carbamate pesticide residues in Poria cocos.
Poria cocoscarbofuranmethomylcarbosulfanbenfuracarbhigh performance liquid chromatography tandem mass spectrometry
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