摘要
目的建立悬浮固化液相微萃取技术结合气相色谱一电子捕获检测（GC—ECD）同时测定水中8种常见有机氯农药的新方法。方法详细考察悬浮固化液相微萃取的实验条件，以正十六烷为萃取剂，在pH6．0和15．0g／100mL NaCl浓度条件下，55℃温浴10min进行有机氯农药的微萃取，萃取液进气相色谱一电子捕获检测器分离分析。结果在优化条件下，8种农药在5～100ng／L浓度范围线性良好，相关系数r≥0．996，方法检出限为0．24～0．78ng／L。将所建立的方法用于自来水、河水和农田池塘水的检测，取得了较为满意的结果，平均回收率在76．0％～106．0％，方法精密度为3．24％～11．60％。结论方法快速灵敏，操作简单，绿色环保，适用于水中8种常见有机氯的批量分析。
Objective To develop a new method for simultaneous determination of eight organochlorine pesticides （OCPs） in water samples using solidification floating organic drop liquid-phase microextraetion （SFO- LPME） combined with gas chromatography-electronic capture detector （GC-ECD）. Methods The experimental conditions of SFO-LPME were determined with n-Hexadecane as extractant, water samples adjusted to pH 6. 0, inonic strength increased by adding 15. 0 g/100 mL NaC1. The OCPs were extracted at 55~C for 10 min and determined with GC-ECD. Results A good linearity （correlation coefficients ≥0. 996） was obtained for eight target compounds from 5 ng/L to 100 ng/L. The method detection limits ranged from 0. 24 ng/L to 0. 78 ng/L. Satisfactory results were achieved with samples of river water, piped water and farmland water, with an average recovery of 76.0%-106.0% and RSD of 3.24%-11.60%. Conclusion The proposed method is rapid, simple and sensitive. It is suitable for batch analyses of eight organic chlorine pesticides in water samples.
出处
《四川大学学报（医学版）》
CAS
CSCD
北大核心
2014年第2期324-327,共4页
Journal of Sichuan University(Medical Sciences)
关键词
悬浮固化液相微萃取
气相色谱-电子捕获检测
有机氯农药
水
Solidification of floating organic drop liquid phase microextraction Gas chromatography - Electron capture detection Organochlorine pesticides, water
