牡蛎中痕量有机氯农药残留量的分析方法研究

Study on analysis method of sixteen trace organochlorine pesticide residuals in oysters

建立了同时测定牡蛎中16种有机氯农药残留量的前处理方法和气相色谱分析方法。在100℃的温度条件下，用加速溶剂提取（ASE）提取样品中的有机氯农药，用凝胶渗透色谱（GPC）结合Florisil柱净化，以RTX-5MS毛细管色谱柱分离、ECD检测器测定。结果表明，样品的加标回收率（n=3）为81％～110％，方法检出限为0．2～0．7ng／g，样品检测的相对标准偏差为2．9％～15．2％。

A method has been developed for sample pretreatment and the simultaneous determination of sixteen organochlorine pesticides in oysters. The method was based on accelerated solvent extraction at 100℃, gel permeation chromatography （GPC） combined with Florisil cartridge clean - up prior to GC/ECD. The experimental results showed that the recoveries for spiked standards were 81%～110%, and the detection limits of this method were 0.2～ 0.7 ng/g, and the relative standard deviations of sample determination were 2.9 %～15.2%.