吉林医药学院学报2016，Vol.37Issue(1)：7-10,4.
固相萃取气相色谱法测定茶叶中5种有机磷农药残留
Determination of 5 organophosphorus pesticide residues in teas by solid-phase extraction and gas chromatography
郗艳丽 1刘敏 1李雅玲 1冯威 1温妨妨 1宋春梅1
作者信息
- 1. 吉林医药学院公共卫生学院,吉林 吉林 132013
- 折叠
摘要
Abstract
Objective To develop a solid-phase extraction and gas chromatography method for determination of 5 or-ganophosphorus pesticide residues in teas,such as dichlorvos,methamidophos,acephate and so on. Methods The samples were extracted by solid-phase extraction,eluted by ethyl acetate and acetone mixture,enriched by rotary evap-orator,diluted with acetone,separated and detected by gas chromatography. The temperature of detector and injection port were 260℃ and 250℃ respectively. The fuel gas was hydrogen and the flow rate was 80 mL/min. The carrier gas was nitrogen and the flow rate was 10 mL/min. The oxidant gas was air and the flow rate was 100 mL/min. Results The limit of detection were in range of 0. 01~0. 02 mg/kg. The recovery at the concentration of 0. 25 mg/kg was in the range of 74. 9% ~88. 9% with relative standard deviations( RSD) in the range of 2. 4% ~10. 3%. The recovery at the concentration of 1 . 0 mg/kg was in the range of 87 . 9% ~100% with RSD in the range of 1 . 7% ~5 . 0%. Conclusion The solid-phase extraction and gas chromatography method was more efficient and could be used to screen and examine large sum of samples.关键词
固相萃取/气相色谱法/茶叶/有机磷农药/残留Key words
solid-phase extraction/gas chromatography/tea/organophosphorus pesticide/residues分类
农业科技引用本文复制引用
郗艳丽,刘敏,李雅玲,冯威,温妨妨,宋春梅..固相萃取气相色谱法测定茶叶中5种有机磷农药残留[J].吉林医药学院学报,2016,37(1):7-10,4.
