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药用植物中残留有机磷农药的定性和定量分析
The Qualitative and Quantitative Analysis of Organophosphate Pesticides in Medicinal Herbs
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摘要: 研究了气相色谱-火焰光度检器(GC-FPD)定量和气相色谱-离子阱质谱(GC-ITMS)定性法测定药用植物中25种有机磷类农药残留的分析方法.以丙酮为提取溶剂,采用超声波辅助提取药用植物中残留的有机磷农药,经凝胶渗透色谱(GPC)净化,气相色谱-火焰光度检测器定量,气相色谱-离子阱质谱定性,同时检测药用植物中25种有机磷类农药的残留量.添加浓度为0.01～0.04 mg·kg~(-1)时,回收率为66.58%～111.20 %,相对标准偏为0.75%～8.07%.Abstract: An analytical method for the determination of 25 kinds of organophosphate pesticide residues in medicinal herbs was established by gas chromatography-flame photometric detection (GC-FPD) and gas chromatography-ion trap mass spectrometry (GC-ITMS). The pesticide residues in samples were extracted with acetone by ultrasonic wave assistant extraction (UAE), and purified by gel permeation chromatography(GPC). GC-ITMS was used as qualitative determination, whereas GC-FPD was used as quantify. This method can simultaneously analyze 25 kinds of organophosphate pesticide residues. When additive levels between 0.01 mg · kg~(-1) and 0.04 mg · kg~(-1) , the range of recovery is between 66.58% and 111.20%, with RSD is between 0.75 % and 8.07%.
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