固相萃取法测定海水中14种有机磷农药

摘要

通过对固相萃取法中萃取剂的选择、用量和样品溶液pH值等条件进行优化处理，建立海水中常见有机磷农药的分析方法。研究结果表明，pH值对萃取结果无影响，当萃取剂选择二氯甲烷、且萃取剂用量为20mL时，萃取结果最优。关键词：有机磷农药；固相萃取；气相色谱；海水%The influence factors in solid phase extraction were studied, such as the extraction solvent, the dosage of extraction solvent, and the pH of solvent. The determination of 14 organophosphorous pesticide residues in seawater were done by gas chromatography. The results showed that the pH values of solvent have unconspicuous effects on the test result. So the best conditions of the solid phase ex- traction were dichloromethane and extraction solvent for 20 mL.