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建立了HPLC-MS/MS法测定中药材黄芩中氨基甲酸酯类农药残留的方法。样品采用乙腈提取,固相萃取柱净化;以含0.2%甲酸的甲醇-水体系为流动相,ODS-18柱为固定相色谱分离,以电喷雾正离子模式进行质谱测定。结果表明:6种氨基甲酸酯农药的回收率为78.59%～101.75%,相对标准偏差为2.98%～12.65%,检出限为0.002～0.004mg/kg。
A HPLC-MS / MS method for the determination of carbamate pesticide residues in Scutellaria baicalensis Georgi was established. The samples were extracted with acetonitrile and cleaned up by solid-phase extraction. The mobile phase was methanol-water with 0.2% formic acid. The mobile phases were separated on ODS-18 column and determined by electrospray positive ion mode. The results showed that the recoveries of six carbamate pesticides ranged from 78.59% to 101.75% with relative standard deviations from 2.98% to 12.65% with a detection limit of 0.002 to 0.004 mg / kg.