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第 38 卷第 4 期Vol. 38 No. 4
2008 年 8 月Aug 2008

所屬欄目:分析與測試

中草藥中40種農藥殘留的氣相色譜-質(zhì)譜分析
聶春林1,2,吳 海1,梁逸曾1 (1.中南大學(xué) 中藥現代化研究中心,湖南 長(cháng)沙,410083;2.湖南化工研究院 國家農藥創(chuàng )制工程技術(shù)研究中心,湖南 長(cháng)沙 410007)
摘 要:建立了一種同時(shí)測定中草藥中有機磷、有機氯、擬除蟲(chóng)菊酯和氨基甲酸酯等四大類(lèi)40種農藥殘留量的分析方法。通過(guò)比較三氯甲烷、乙腈、正己烷、乙酸乙酯和丙酮等多種溶劑的提取效果,確定三氯甲烷和丙酮為提取溶劑;提取的樣品經(jīng)弗羅里硅土凈化,用GC-MS選擇離子模式進(jìn)行測定,采用外標法進(jìn)行定量。40種農藥在65 min內達到理想的分離效果。以2個(gè)添加水平測定樣品的回收率和相對標準偏差,回收率在88.6%和107.1%之間,RSD均低于8.0%。各農藥檢測限為0.5~37.5 μg/kg,定量限為1.4~112.5 μg/kg。采用該方法,對百合、刀豆、菊花、黃芪、人參、當歸、車(chē)前草7種不同種類(lèi)的中草藥進(jìn)行了實(shí)際檢測,均發(fā)現一定量的農藥殘留。該方法簡(jiǎn)便、快速、準確、靈敏,且重現性好,可用于中草藥中多種農藥殘留的同時(shí)測定。
關(guān)鍵詞:氣相色譜-質(zhì)譜法;中草藥;多農藥殘留
中圖分類(lèi)號:S481+.8  文獻標識碼:B  文章編號:1009-9212(2008)04- 0059-07
Multi-residues Analysis of Pesticides in Herbal Medicines by Gas Chromatography-mass Spectrometry with SIM Model
NIE Chun-lin1,2,WU Hai1, LIANG Yi-zeng1 (1. Research Center of Modernization of Chinese Herbal Medicine,Central South University,Changsha 410083,China;2. National Engineering Research Centre for Agrochemicals,Hunan Research Institute of Chemical Industry,Changsha 410007,China)
Abstract:An analysis method based on gas chromatography-mass spectrometry(GC-MS) was developed to determine 40 pesticides including organochlorinates,organophosphates,synthetic pyrethroids and carbamate. Sample was extracted with mixture of chloroform and acetone and the extract was further purified through a Florisile column chromatography. The prepared sample was then analyzed using GC-MS with selective ion monitoring(SIM)mode. 40 pesticides were well separated within 65 minutes,and all relative standard deviations(RSD)were less than 8.0%,and the recoreries were 88.6%~107.5%. The limits of detection(LODs) ranged from 0.5~37.5 μg/kg under the signal noise ratio 3∶1,and the limits of quantitation(LOQs)were 1.4~112.5 μg/kg. The method is simple,rapid,sensitive,and of good repeatability. It is suitable for the multiresidues analysis of pesticides in herbal medicines.
Key words:gas chromatography-mass spectrometry(GC-MS);traditional chinese medicines;pesticide multi-residues
基金項目:科技部國際科技合作項目(2006DFA41090,2007DFA40680)。
作者簡(jiǎn)介:聶春林(1969-),女,湖南衡陽(yáng)人,高級工程師,碩士研究生,研究方向:色譜分析及分析方法研究。( E-mail:hgyhaixin1996@163.com)
收稿日期: 2008-07-2
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