【摘要】 气相色谱-质谱法同时测定中草药中多种有机磷及氨基甲酸酯类农药残留量。采用V(乙腈)∶V(丙酮)=3∶7混合溶剂微波辅助提取,弗罗里硅土和中性氧化铝层析柱净化,气相色谱-质谱(GC-MS)联用检测,农药混标在0.01~1.0μg/mL范围内线性良好,在0.5、0.1、0.05μg/mL 3个水平添加平均回收率分别为86.5%~110.6%、81.2%~108.3%和72.9%~122.3%,相对标准偏差分别为2.6%~8.3%、4.6%~9.7%和2.3%~10.7%。更多还原

【Abstract】 To make a simultaneous determination of organophosphorous and carbamates pesticide residues in Chinese herbal medicine by gas chromatography-mass spectrometry. The pesticide residues were extracted from Chinese herbal medicine with solvents by microwave assisted extraction;Extracts were cleaned up with a column filled with Florisil and neutral aluminum oxide,and analyzed with gas chromatography-mass spectrometry.The results presented the excellent linearity between analytical signal and analyte concentration in the range of 0.01～1.0 μg/mL;The recoveries obtained from samples spiked with standards at the concentration levels of 0.5、 0.1 and 0.05 μg/mL were in the ranges of 86.5%～110.6%、 81.2%～108.3% and 72.9%～122.3%,respectively,with relative standard deviations of 2.6%～8.3%、 4.6%～9.7% and 2.3%～10.7%,respectively.The method can be used for simultaneous determination of pesticide residues in Chinese herbal medicine.更多还原