山东农业大学学报（自然科学版）2011，Vol.42Issue(4)：492-498,7.
浊点萃取-正己烷反萃取气相色谱法测定苹果汁中5种有机磷农药残留
CLOUD POINT EXTRACTION COUPLED WITH N - HEXANE BACK - EXTRACTION FOR DETERMINATION OF 5 KINDS OF ORGANOPHOSPHORUS PESTICIDES IN CIDER BY GAS CHROMATOGRAPHY
周璐 1陈敏 2张凯 3李修乐 1徐蕾 1王明林1
作者信息
- 1. 山东农业大学食品科学与工程学院,山东泰安271018
- 2. 山东省栖霞市农业技术推广中心,山东栖霞265300
- 3. 中山大学化学与化学工程学院,广东广州510275
- 折叠
摘要
Abstract
A method was developed for the determination of organophosphorus pesticides (diazinon, pyrimithate, thiophos, isofenphos and triazophos) in cider using cloud point extraction (CPE) coupled with n -hexane back - extraction and gas chromatography. Pesticides were extracted with the non - ionic surfactant Polyethylene glycol 4000. The surfactant - rich phase was back extracted by n - hexane. The apparatus was gas chromatography with flame photometric detector ( FPD). The pesticide residues were calculated by external standard method. Good linearrelation was obtained over the range of 0.9986% ~ 0.9996% for these five organophosphorus pesticides in 0.05 ~ 2.00 mg/L. The average recoveries of the five organophosphorus pesticides were 72.5% ~ 102.6% with corresponding RSD of 1.97% ~ 7.85% in the amounts 0.0015 ~ 0.0300 mg/L. The limits of detection (LOD) was 0.13 ~ 1.50 (xg/kg in this method. The method was simple, reproducible and of high sensitivity.关键词
浊点萃取/反萃取/气相色谱/有机磷农药/苹果汁Key words
Cloud point extraction/back -extraction/gas chromatography/organophosphorus pesticide/cider分类
化学化工引用本文复制引用
周璐,陈敏,张凯,李修乐,徐蕾,王明林..浊点萃取-正己烷反萃取气相色谱法测定苹果汁中5种有机磷农药残留[J].山东农业大学学报（自然科学版）,2011,42(4):492-498,7.
