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中国农学通报

中国农学通报 ›› 2011, Vol. 27 ›› Issue (18): 264-267.

所属专题： 植物保护

• 植物保护 农药 • 上一篇    下一篇

拟除虫菊酯类农药在人参中的多残留方法研究

钱永盛 侯志广 刘建国 孙慧 刘晓旭 逯忠斌   

  • 收稿日期:2011-03-09 修回日期:2011-04-14 出版日期:2011-07-25 发布日期:2011-07-25
  • 基金资助:

    农业部农药残留课题资助

The Study on a Method for Determining Multi-residues of Pyrethroid Pesticides in Ginseng

  • Received:2011-03-09 Revised:2011-04-14 Online:2011-07-25 Published:2011-07-25

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摘要：

建立了人参样品中氯菊酯、联苯菊酯、氟氯氰菊酯、氰戊菊酯、溴氰菊酯、甲氰菊酯和三氟氯氰菊酯7种拟除虫菊酯类杀虫剂的多残留气相色谱分析方法（GC），用乙腈提取人参样品，石墨炭黑-氨基串联柱净化，经DB-1701石英毛细管柱（30 m×0.25 mm×0.25 μm）分离后，采用GC-μECD测定。结果表明在0.05~1 mg/kg的线性范围内，相关系数（r）分别为0.9993、0.9995、0.9992、0.9996、0.9988、0.9993、0.9993。测定结果高、中、低3个水平的平均回收率在79.1%~103.3%之间，相对标准偏差（RSD）在3.6~9.7之间，检出限在0.0008~0.03 mg/kg之间。方法简便、快速、净化效果好，适合人参中痕量拟除虫菊酯类农药残留的同时测定。

关键词: 玉米, 玉米

Abstract:

The aim was to develop a method for determining multi-residues of permethrin, bifenthrin, baythrioid, fenvalerate, deltamethrin, fenpropathrin, lambda-cyhalothrin in Ginseng samples by using Gas Chromatography (GC). Sample was extracted by acetonitrile, cleaned up with a CARB/NH2 column, followed by separation on a DB-1701 capillary column, and then detected by GC-μECD. A mixed standard solution prepared from primary standards of the 7 pesticides, and calibration curve for each of the 7 pesticides was prepared covering the concentration ranges of 0.05 to 1 mg/kg. The correlation coefficients of these calibration curves were 0.9993, 0.9995, 0.9992, 0.9996, 0.9988, 0.9993 and 0.9993, respectively. The recoveries of 3 standard addition levels of high, medium, low concentrations were 79.1%-103.3%, with relative standard deviations from 3.6 to 9.7, the detection limits were from 0.0008 to 0.03 mg/kg for pyrethroid pesticides. The method was simple, fast, accurate and suitable for detecting the residues of pyrethroid pesticides in ginseng.