Determination of 10 kinds of Organochlorine Pesticide Residues in Rice by QuEChERS-Gas Chromatography-Triple Quadrupole Mass Spectrometry
Objective to establish a method for the simultanceous determination of 10 kinds of organochlorine pesticide residues in rice.After crushing the rice sample,it was extracted with 1%acetonitrile acetate solution,purified and filtered using the QuEChERS method,and the analysis results were detected by chromatography-triple quadrupole mass spectrometry.The results indicate that the 10 kinds of organochlorine pesticide had good linear relationship in the range of 5～100 ng/mL,the correlation coefficients are all above 0.997.The limit of de-tection was 0.003 to 0.005 mg/kg,and limit of quantification was 0.01 mg/kg.The recoveries at 3 spiked levels of 0.01 mg/kg,0.05 mg/kg,0.1 mg/kg of 10 organochlorine pesticides ranged from 72.08%to 118.01%,with the relative standard deviations(RSDs)were 0.6%～7.2%.This method has the characteristics of simple operation,low reagent dosage,and speed,and is suitable for high-throughput detection of organochlorine pesticide residues.
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