气相色谱法检测食用菌中八氯二丙醚的残留量

Determination of Octachlorodipropyl Ether Residue in Edible fungi by Gas-Chromatography

建立了一种测定食用菌中八氯二丙醚（S-2）残留量的气相色谱方法。样品中的八氯二丙醚经丙酮-正己烷混合溶剂提取,浓硫酸液-液分配磺化法进行净化,以气相色谱法（GC-ECD）测定,外标法定量。实验结果表明：样品中加入0.005~0.05mg/kg浓度水平的S-2,回收率在72.4%~104.4%之间,相对标准偏差小于7.86%（RSD,n=6）。本方法快速、准确,可用于食用菌类样品的日常检测和质量监控。

The method was established for the determination of octachlorodipropyl ether（S-2） residue in edible fungi by GC.The samples were extracted with acetone and hexane,and purified by liquid-liquid partition sulfonation with H2SO4.The external standard method was adopted for the determination by μECD.Tests of recovery were made by addition of standard S-2 to the edible fungi samples at the concentration levels in the range of 0.005~0.05 mg/kg,and the recoveries were between 72.4% and 104.4%,with RSDs less than 7.86%.The results indicated the method had the advantages of rapidness and accuracy,and can be used for routine analysis and quality control in fungi samples.