食品科学 ›› 2010, Vol. 31 ›› Issue (10): 279-282.doi: 10.7506/spkx1002-6630-201010061

• 分析检测 • 上一篇    下一篇

茶叶中氟虫腈残留量的检测

付晓芳,林雁飞,李 晶,赵晓亚,王 鹏   

  1. 湖北出入境检验检疫局
  • 收稿日期:2009-09-07 修回日期:2010-01-04 出版日期:2010-05-15 发布日期:2010-12-29
  • 通讯作者: 付晓芳 E-mail:fuxf@hbciq.gov.cn

Gas Chromatographic Determination of Fipronil Residue in Tea

FU Xiao-fang,LIN Yan-fei,LI Jing,ZHAO Xiao-ya,WANG Peng   

  1. Hubei Entry-Exit Inspection and Quarantine Bureau, Wuhan 430050, China
  • Received:2009-09-07 Revised:2010-01-04 Online:2010-05-15 Published:2010-12-29
  • Contact: FU Xiao-fang E-mail:fuxf@hbciq.gov.cn

摘要:

研究建立气相色谱法测定茶叶中氟虫腈残留量的方法。样品用乙腈提取,弗罗里硅土(含活性炭)柱层析净化,配有μECD 检测器的气相色谱仪测定。氟虫腈的最小检测限量为2 × 10-12g,最低检测限为2μg/kg。茶叶中氟虫腈的添加回收率为74.0%~92.0%,变异系数为3.26%~10.55%。方法的准确性、灵敏度均达到农残分析的要求。

关键词: 氟虫腈, 气相色谱法, 茶叶, 固相萃取

Abstract:

An analytical method based on gas chromatography (GC) was proposed for the determination of fipronil residue in tea. Samples were extracted with acetontrile and cleaned up on a Florisil (containing graphitized carbon black) column prior to HPLC analysis with μECD detection. The minimum detectable amount of fipronil was 2 × 10-12 g and the minimum detectable concentration of fipronil in tea was 2μg/kg. Average recoveries of 3 replicates for fipronil in a real sample spiked at 5 levels were within the range of 74.0%-92.0%, with a RSD ranging from 3.26% to 10.55%. The accuracy and sensitivity of the developed method both meet the requirements of pesticide residue analysis.

Key words: fipronil, gas chromatography, tea, solid-phase extraction

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