固相微萃取-气相色谱法同时测定饮用水中27种有机磷农药  

Determination of 27 organophosphorous pesticide residues in drinking water by solid phase microextraction-gas chromatography

作　　者：李晓晶[1] 贺小平[1] 黄聪[1] 甘平胜[1] 于鸿[1] 

机构地区：[1]广州市疾病预防控制中心,广州510080

出　　处：《中国卫生检验杂志》2009年第6期1231-1233,共3页Chinese Journal of Health Laboratory Technology

摘　　要：目的：建立固相微萃取（SPME）结合气相色谱-火焰光度检测器（GC-FPD）同时测定饮用水中27种有机磷农药残留的方法。方法：实验中对影响SPME萃取效率的萃取头、搅拌速度、萃取时间、萃取温度等条件进行了优化。最终确定的SPME条件为：PDMS-DVB萃取头,搅拌速度1150 rpm,萃取时间45min,萃取温度60℃。结果：27种有机磷农药的峰面积与其质量浓度均有良好的线性关系,相关系数均大于0.990;最小检测量为4.3～87 ng/L;样品的加标回收率为76.4%～112.9%（相对标准偏差为1.5%～9.7%）。结论：该方法具有分析速度快、灵敏度高、重现性好、预处理简单等优点。Objective： A method for the determination of 27 organophosphorus pesticide residues （OPPs） in drinking water by solid phase microextraction （SPME） coupled with gas chromatography （GC） was developed and validated. Methods：The extraction conditions were optimized with the results of extraction fiber of PDMS - DVB, string rate of 1150 rpm, extraction time of 45 min, extraction temperature of 60℃. Results： The good linearities were obtained for 27 OPPs （ r 〉 0. 990）. The detection limits were between 4. 3 - 87 ng/L. The average recoveries were between 76.4% - 112. 9% and relative satandard deviations 1.5% 9. 7%. Conclusion：The proposed method has the advantages of solventfree sample preparation, simplicity of the procedure, good sensitivity and the reproducibility.

关 键 词：固相微萃取 气相色谱 有机磷农药 饮用水 

分 类 号：O657.71[理学—分析化学]