ASE提取土壤中有机氯农药的方法研究

Studies on the Method of Analysis OCPs in Soil Using ASE Extracting

介绍了ASE提取、硫酸磺化和GPC净化土壤中有机氯农药的试验方法，并通过对比试验、条件试验等对ASE提取土壤中有机氯农药的效果进行了验证。结果表明，温度在80～110℃，压力在1200～1800psi均适用于提取土壤中有机氯农药，20种有机氯农药除了异狄氏剂回收率偏高外，其它19种全部在50％～150％之间，相对标准偏差均在20％以内。ASE提取、GPC净化，20种农药样品加标平均回收率50％～117％；相对标准偏差3％～28％；2种替代物回收率84％～102％，相对标准偏差6％～7％。

ASE is a extraction method uses elevated temperature （100EC） and pressure （1500～2000psi） to achieve analyte recoveries equivalent to those from Soxhlet extraction, using less solvent and taking significantly less time than the Soxhlet procedure. The paper introduces a procedure using ASE extracting organochlorine pesticides（OCPs） from soil and Gel - Permeation or sulfuric acid cleanup. As a results, in any temperature and pressure between 80 ～ 11℃ and 1200～1800psi the recoveries of 20 kinds of CLP OCPs except Endrin are 50%～150%, the relative standard deviations （RSDs） are all within 20%. Adding 20 OCPs in soil matrix, the average recoveries are 50%～117% ;the RSDs are 3%～28%, the two SS recoveries are 84%～102%, their RSDs are 6%～7%.