气相色谱电子捕获检测器测定谷物中滴滴涕、六六六  

Determination of DDTs and HCHs in grains by gas chromatography with electron capture detector

作　　者：王会宁 韩冰 刘佳铭 袁晓转 张建伟 WANG Huining;HAN Bing;LIU Jiaming;YUAN Xiaozhuan;ZHANG Jianwei(Center of Product Quality Inspection and testing of Luoyang,Luoyang 471000,China)

机构地区：[1]洛阳市产品质量检验检测中心,河南洛阳471000

出　　处：《化学分析计量》2024年第9期95-100,共6页Chemical Analysis And Meterage

摘　　要：建立气相色谱电子捕获检测器测定谷物中滴滴涕、六六六的方法。样品先经10 mL水浸润,然后用石油醚提取,用浓硫酸磺化法进行净化处理,采用气相色谱电子捕获检测器进行测定。滴滴涕、六六六的质量浓度在5~80 ng/mL范围内与色谱峰面积具有良好的线性关系,相关系数均大于0.999,检出限均低于3.0μg/kg。样品加标平均回收率为79.8%~108.9%,测定结果的相对标准偏差为2.28%~6.69%(n=6)。该方法提高了非极性有机试剂对谷物中滴滴涕和六六六的提取效率,且提取、净化过程简单,成本低,可同时测定谷物中滴滴涕和六六六。A method for the determination of DDTs and HCHs in grain by gas chromatography with electron capture detector was established.The samples were first soaked in 10 mL of water,then extracted with petroleum ether,purified with concentrated sulfuric acid sulfonation method,and detected by gas chromatography with electron capture detector.The mass concentrations of DDTs and HCHs had a good linear relationship with the chromatographic peak areain the range of 5-80 ng/mL,the correlation coefficients were all more than 0.999,and the detection limits of DDTs and HCHs were all less than 3.0μg/kg.The average recoveries of sample spiked were 79.8%-108.9%,and the relative standard deviations of the determination results were 2.28%-6.69%(n=6).This method improves the extraction efficiency of non-polar organic reagents for DDTs and HCHs in grains,has simple extraction and purification process and low cost,and which can be applied to simultaneously determine DDTs and HCHs in grains.

关 键 词：气相色谱法 电子捕获检测器 六六六 滴滴涕 

分 类 号：O657.7[理学—分析化学]