食品科学 ›› 2007, Vol. 28 ›› Issue (2): 267-270.

• 分析检测 • 上一篇    下一篇

固相萃取-毛细管气相色谱法同时测定黄瓜中23种有机氯和拟除虫菊酯类农药残留量

 孔祥虹, 海云, 乐爱山, 李建华, 仇农学   

  1. 陕西师范大学食品工程系; 西北大学化学系; 陕西出入境检验检疫局技术中心; 陕西师范大学食品工程系 陕西西安710062 .陕西出入境检验检疫局技术中心; 陕西西安710068; 陕西西安710069; 陕西西安710062;
  • 出版日期:2007-02-15 发布日期:2011-12-31

Determination of 23 Organochlorine and Pyrethroid Pesticide Residues in Cucumber by Solid-Phase Extraction and Capillary Gas Chromatograph

 KONG  Xiang-Hong, HAI  Yun, LE  Ai-Shan, LI  Jian-Hua, CHOU  Nong-Xue   

  1. 1.Department of Food Engineering, Shaanxi Normal University, Xi’an 710062, China; 2.Shaanxi Entry-Exit Inspection and Quarantine Bureau, Xi’an 710068, China; 3.Department of Chemistry, Northwest University, Xi’an 710069, China
  • Online:2007-02-15 Published:2011-12-31

摘要: 目的:建立了蔬菜中23种有机氯类和拟除虫菊酯类的固相萃取-毛细管气相色谱(SPE-CGC)分析方法。方法:样品以正己烷为提取剂,采用超声波提取黄瓜样品,然后用Florisil固相萃取小柱净化提取物。采用DB-35MS弹性石英毛细管气相色谱柱分离样品,电子捕获检测器检测。结果:23种农药在25min内很好地分离;样品加标回收率(n=3)为76.0%~110.1%,相对标准偏差0.81%~3.28%。最低检出限范围为0.03~2.06μg/kg。结论:该方法的测定结果满足多残留农残的检测要求。

关键词: 毛细管气相色谱法, 固相萃取, 有机氯农药, 拟除虫菊酯类农药, 黄瓜

Abstract: Objective:The solid-phase extraction and capillary gas chromatography were introduced for determining 23 organochlorine and pyrethroid pesticide residues in cucumber. Method:The organochlorine and pyrethroid pesticides were extracted from cucumber samples with n-hexane by ultrasonic method and cleaned up by Florisil solid-phase extraction column. Then,the extract was separated by capillary column(30 m ×0.25 mm i.d. ×0.25μ m)and detected by ECD(electron capture detector). Results:The average recoveries for spiked standards are 76.0%~110.1%. The relative standard deviations are 0. 81%~3.28%. The range of limit of detection(LOD) is 0.03~2.06 μg/kg. Conclusion:The method is effective,fast and accurate.

Key words: capillary gas chromatography, solid-phase extraction, organochlorine pesticides, pyrethroid pesticides, cucumber