MSPD-GC法测定苹果和蔬菜中腐霉利农药残留

建立了基质固相分散萃取-气相色谱法(MSPD-GC)测定农产品中腐霉利农药残留的方法。研究了萃取及色谱条件对测定结果的影响,确定了最佳萃取条件:以弗罗里硅土作分散剂,样品与佛罗里硅土的比例为1∶4,以8 mL正己烷+丙酮(1∶1)作为洗脱剂。结果表明,该方法的相对标准偏差(RSD)为5.2%～6.8%;最低检出限为0.05μg/g;加标回收率为87.3%～104.3%。该法简单、准确、灵敏、重现性好,能满足农产品中腐霉利残留的分析测定要求。

Determination of Procymidone Pesticide Residue in Apples and Vegetables by Matrix Solid Phase Dispersion-gas Chromatography

An analytical method for the extraction and detection of procymidone pesticide residues in apples and vegetables by using matrix solid phase dispersion-gas chromatography（MSPD-GC） was established.The effects of extraction and determination conditions on the detection of procymidone were studied and the optimum extraction conditions were as follows： the extraction sorbent,the ratio of sample to florisil sorbent and the eluting solvent were florisil,1：4,and 8 mL of hexane＋acetone（1：1）.The recoveries of standard addition,the RSDs and the detection limits of the proposed method were： 87.3%~104.3%,5.2%~6.8% and 0.05 μg/g.The experiments showed that the presented method was simple,accurate,sensitive and applicable to the determination of procymidone in agricultural products.