摘要
用中空纤维膜液相微萃取-气相色谱质谱法测定水中的3种常用农药(甲霜灵、三唑酮、二甲戊灵)。通过实验确定最佳萃取条件为:萃取剂为甲苯,萃取剂用量3μL,水样体积10 mL,萃取温度45°C,萃取时间15 min,搅拌速率为500 r/min,萃取后取1μL有机溶剂直接进样进行气相色谱质谱分离检测。在此条件下,甲霜灵、三唑酮、二甲戊灵的富集倍数分别为170、140、390倍,检出限分别为1.0、1.3和0.1μg/L。测定实际水样的加标回收率在89.5%～95.5%之间。该方法简单、快速、成本低廉,可以用于水中甲霜灵、三唑酮、二甲戊灵的快速检测。
The hollow fiber membrane/liquid-phase microextraction combined with gas chromatography-mass spectrometry was used to determine the three pesticides （metalaxyl, triadimefon and pendimet） in water. The experiment showed that the ideal microextraction conditions were as follows： 3μL of toluene as the extraction solvent; 10 mL aqueous sample without NaCl addition was extracted for 15 min; extraction temperature of 45 ℃; 500 r/min of stirring speed. After extraction, 1.0μL of the organic solvent was then injected into GC/MS for further analysis. Under these conditions, the concentration factor for metalaxyl, triadimefon and pendimet were 170, 140 and 390, respectively. The detection limits （S/N=3） were 1.0μg/L, 1.3 μg/L and 0.1μg/L, respectively. The recoveries for real water samples were in range of 89.5%～95.5%. The method, simple, rapid and low cost, can be used to quiekly determine the metalaxyl, triadimefon and pendimet in water.
出处
《苏州科技学院学报（工程技术版）》
CAS
2008年第3期38-42,共5页
Journal of Suzhou University of Science and Technology （Engineering and Technology）
基金
苏州市社会发展科技计划项目(SS0734)
关键词
中空纤维膜液相微萃取
气相色谱-质谱
甲霜灵
三唑酮
二甲戊灵
hollow fiber membrane liquid-phase microextraction
gas chromatography-mass spectrometry
metalaxyl
triadimefon
pendimet
