色谱2011，Vol.29Issue(5)：443-449,7.DOI:10.3724/SP.J.1123.2011.00443
多壁碳纳米管固相萃取净化气相色谱法分析蔬菜中有机氯和拟除虫菊酯农药残留
Analysis of organochlorine pesticides and pyrethroid pesticides in vegetables by gas chromatography-electron capture detection coupled with solid-phase extraction using multiwalled carbon nanotubes as adsorbent
摘要
Abstract
A multi-residue analytical method based on solid-phase extraction (SPE) with multi-walled carbon nanotubes (MWCNTs) as adsorbent was developed. The determination of 6 organochlorine pesticides and 7 pyrethroid pesticides in vegetables ( including cucumber, cherry tomato, cabbage, lettuce, purple cabbage, leek, shallot and onion) was carried out by gas chromatography-electron capture detection (GC-ECD). The GC-ECD method used two columns ( HP-50 and HP-1 ) and two ECD detectors. The HP-50 column was used for the analysis and the HP-1 column for validation. The clean-up conditions were optimized. The analytes were extracted by acetonitrile, and the extract was cleaned up by the MWCNTs SPE cartridge.The extract was re-dissolved by hexane, eluted with acetone-hexane (7: 3, v/v) from the columns. The recoveries were over 70％ for the 11 pesticides in the 13 pesticides. The results indicated that the MWCNTs SPE cartridge was efficient for 8 vegetable samples, because it reduced the contamination of the coloring materials to GC-ECD. The experimental results showed the MWCNTs SPE cartridge can adsorb the coloring materials and the eluant was nearly colorless.关键词
多壁碳纳米管/气相色谱-电子捕获检测/有机氯农药/拟除虫菊酯农药/蔬菜Key words
multi-walled carbon nanotubes/ gas chromatography-electron capture detection (GC/ECD)/ organochlorine pesticides/ pyrethroid pesticides/ vegetables分类
化学化工引用本文复制引用
赵海香,贾艳霞,丁明玉,孙大江,赵孟彬..多壁碳纳米管固相萃取净化气相色谱法分析蔬菜中有机氯和拟除虫菊酯农药残留[J].色谱,2011,29(5):443-449,7.基金项目
北京市海淀区科委企业博士后科研专项基金(k2008198). （k2008198）
