气相色谱-质谱法同时测定草莓中7种除草剂农药残留  

Simultaneous Determination of 7 Herbicides in Strawberry by Gas Chromatography-Mass Spectrometry

作　　者：高文惠[1] 王凤池[2] 郭春海[2] 

机构地区：[1]河北科技大学生物科学与工程学院,河北省石家庄050018 [2]河北出入境检验检疫局,河北省石家庄050071

出　　处：《食品科学》2008年第2期359-361,共3页Food Science

基　　金：河北省博士基金项目(06547003D-3);河北省教育厅课题(Z2005202);河北科技大学杰出青年基金项目(2006JC-14)

摘　　要：建立了气相色谱-质谱法(GC-MS),选择离子技术对草莓中乙草胺、西玛津、哒螨酮、禾草克、阿特拉津、扑草净、甲草胺多残留进行同时检测的方法。匀浆后的草莓试样用乙酸乙酯进行提取,提取液经滤纸过滤后收集,再浓缩蒸干,用丙酮:正己烷(30:70,V/V)溶液溶解至5ml,经Florisil固相萃取柱净化,吹干后用丙酮定容,供气相色谱-质谱联用仪进行测定。实验结果表明,除草剂在0.05～1.00μg/ml浓度范围内,具有良好的线性响应,相关系数分别在0.9964到0.9998之间,添加浓度为0.05～1.00μg/ml时,回收率在77.4%～125.2%之间,该方法的最低检测限为0.01μg/g。A method is described for simultaneous analysis of simazine, atrazine, acetochlor, alachlor, prometryne, pyridaben, quizalofop-ethyl residue in strawberry using gas chromatography-mass spectrometry （GC-MS）. The herbicides in the sample was extracted with ethyl acetate.The extract was decanted into a flask through a filter paper, then the filtered solution was concentrated to dry. The dry sample was dissolved and added to 5 mL with acetone-n-hexane （30：70, VN）. It was cleaned up by Florisil, concentrated again. The sample was dissolved and adjusted to lmL with acetone.The solution was used for C-C-MS analysis. The calibration curve has good linear in the ranges of 0,05～1.00 μg/ml, and the correlation coffient is 0.9964～0.9998 for herbicides, respectively. The recovery of the method is 77.4% ～125.2%, and the detection limit is 0.01 μg/g.

关 键 词：草莓 除草剂 多残留分析 气相色谱-质谱 

分 类 号：TS207.53[轻工技术与工程—食品科学]