色谱2012，Vol.30Issue(9)：926-930,5.DOI:10.3724/SP.J.1123.2012.06018
分散液-液微萃取-气相色谱法快速检测番茄中3种拟除虫菊酯类农药
Rapid determination of pyrethroids in tomatoes using gas chromatography combined with dispersive liquid-liquid microextraction
摘要
Abstract
An analytical method was established for the determination of three pyrethroids (bifenthrin, fenpropathrin and flueythrinate) in tomatoes using the quick, easy, cheap, effective, rugged and safe (QuEChERS) cleanup and gas chromatography. The tomato samples were extracted with acetonitrile, cleaned-up by dispersive solid-phase extraction using primary secondary amine as sorbents, concentrated by dispersive liquid-liquid microextraction (DLLME), and analyzed by gas chromatography. Factors affecting the extraction efficiency such as the type and volume of extraction solvent and the volume of dispersive and extraction time were investigated in detail. In the DLLME procedure, 40 jjlL chloroform was used as the extraction solvent and 1 000 jjlL acetonitrile was used as the dispersive solvent and the extraction time was 60 s. Under the optimized conditions, the limits of detection for bifenthrin, fenpropathrin and flucythrinate were 0. 5, 0. 5 and 0. 3 jig/kg, and the average recoveries in tomato samples at the spiked levels of 1, 10 and 50 |j.g/kg were 89% - 109%, 92. 5% - 105% and 90% - 108% with the relative standard deviations of 2. 5% - 7. 6%, 2. 8% - 5. 7% and 3. 8% - 9. 1%, respectively. The proposed method is simple, quick, safe, reliable and applicable to analyzepyrethroid residues in tomato samples.关键词
分散液-液微萃取/QuEChERS/气相色谱/拟除虫菊酯类农药/番茄Key words
dispersive liquid-liquid microextraction/ QuEChERS/ gas chromatography (GC) /pyrethroid pesticides/ tomatoes分类
化学化工引用本文复制引用
李贤波,赵嫚,李胜清,陈浩,沈菁..分散液-液微萃取-气相色谱法快速检测番茄中3种拟除虫菊酯类农药[J].色谱,2012,30(9):926-930,5.基金项目
教育部高等学校博士学科点专项科研基金项目(20100146110004) （20100146110004）
