气相色谱法测定食品中指示性多氯联苯
The Determination of Indicator Polychlorinated Biphenyls in Food by Gas Chromatography
文海琼 1江晓蓝1
作者信息
- 1. 广东省汕尾市质量计量监督检测所,广东汕尾 516600
- 折叠
摘要
目的:建立气相色谱法测定食品中指示性多氯联苯含量的分析方法.方法:样品经过水浴加热振荡提取后,依次经硫酸、层析柱净化,气相色谱-电子捕获检测器测定,内标法定量.结果:7 种指示性多氯联苯在 5～800 μg·L-1 线性关系良好,相关系数均大于 0.999.定量限为 0.12～0.35 μg·kg-1,RSD为1.36%～2.55%,在9 μg·kg-1 加标水平下回收率为62.87%～98.62%.结论:建立的方法灵敏度高、稳定性好.对汕尾市场随机采集的4类22种水产动物及其制品进行多氯联苯检测,检出率为4.55%,未出现超标现象.
Abstract
Objective:To establish a gas chromatography method for the determination of indicative polychlorinated biphenyls(PCBs)in food.Method:After the samples were extracted by water bath heating and shaking,they were purified by sulfuric acid and chromatography column,and then determined by gas chromatography-electron capture detector(GC-ECD)and quantified by internal standard method.Result:The linear relationship of 7 indicative PCBs was good in the range of 5～800 μg·L-1,and the correlation coefficients were all greater than 0.999.The limit of quantification was 0.12～0.35 μg·kg-1,the RSD was 1.36%～2.55%,and the recovery rate was 62.87%～98.62%at the spiked level of 9 μg·kg-1.Conclusion:The established method has high sensitivity and good stability.PCBs were detected in 22 kinds of aquatic animals and their products randomly collected from 4 categories in Shanwei market,and the detection rate was 4.55%,and no excessive phenomenon was found.
关键词
食品/多氯联苯/气相色谱Key words
food/polychlorinated biphenyls/gas chromatography引用本文复制引用
出版年
2024
NETL
NSTL
万方数据