%0 Journal Article
%T Determination of Difenoconazole Residue in Foods by Gas Chromatography-Negative Chemical Ionization Mass Spectrometry<br>气相色谱-负化学离子源质谱法检测食品中苯醚甲环唑的残留量
%A SHEN Weijian
%A YANG Wenquan
%A SHEN Chongyu
%A ZHAO Zengyun
%A XU Jinzhong
%A DING Tao
%A <br>沈伟健
%A 杨雯筌
%A 沈崇钰
%A 赵增运
%A 徐锦忠
%A 丁涛
%J 色谱
%D 2007
%I 
%X A method is presented for the determination of difenoconazole residue in all kinds of foods by solid phase extraction-gas chromatography-negative chemical ionization mass spectrometry(SPE-GC-MS/NCI).Difenoconazole residue was extracted with ethyl acetate from different samples,such as perilla leaves,carrots,spinach powder,rice,gram,jasmine flower tea,oolong tea,strawberries,sauce,bee honey,beef,chicken and eels,etc.The extracts were cleaned-up by active carbon SPE column connected to alumina neutral SPE column or Florisil SPE column only.Analytical screening was determined by the technique of GC-MS/NCI on selected ion monitoring mode.The recoveries of difenoconazole in most samples were in the range from 70% to 120% at three spiked levels,0.01 mg/kg,0.04 mg/kg and 0.10 mg/kg,and the relative standard deviations(RSDs) were below 9.5%.The linearity of the method is good from 0.02 to 1.00 mg/L,and limit of detection(LOD) was 0.000 5 or 0.001 0 mg/kg for different type samples.The method is selective without interference and is suitable for determination and conformation of difenoconazole residue in all kinds of foods.
%K solid phase extraction(SPE)
%K gas chromatography-mass spectrometry(GC-MS)
%K negative chemical ionization(NCI)
%K difenoconazole<br>固相萃取
%K 气相色谱-质谱联用
%K 负化学离子源
%K 苯醚甲环唑
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=6579068328FE643F&jid=4D81E042D77AFEC6881D14759692069C&aid=27491FAF6C5325D3&yid=A732AF04DDA03BB3&vid=C5154311167311FE&iid=38B194292C032A66&sid=6B3068A7C27BD349&eid=65C08888CCE4801E&journal_id=1000-8713&journal_name=色谱&referenced_num=0&reference_num=8