磁性分散固相萃取/ECD-GC同时检测家禽、畜肉中有机氯和菊酯类农药残留

Simultaneous Detection of Organochlorine and Pyrethroid Pesticide Residues in Poultry and Livestock Meat by Magnetic Dispersion Solid Phase Extraction/ECD-GC

建立了采用气相色谱法对家禽、畜肉样品中的有机氯和菊酯农药残留进行同时检测的方法。样品经过一种新型的磁性分散固相萃取技术——Fe3O4/AMWNTs磁性材料进行超声提取、乙腈解析20 min、净化以及浓缩,然后进行气相色谱-电子捕获检测器分析,外标法定量。结果表明农药残留的分离度好,线性关系良好,相关系数均大于0. 999,相对标准偏差(RSD)<5%,实际样品检出率在75%~95%之间。此方法灵敏度高、操作快速、简便、净化彻底,回收率在94. 5%~99. 2%之间,结果令人满意,方法可适用于肉类产品中有机氯和菊酯类农药残留的筛查及定量检测。

To determine the residues of organochlorine and pyrethroid pesticides in livestock meat and poultry.Simultaneously detected organochlorine and pyrethroid pesticide residues in samples by gas chromatography.A new tape of magnetic dispersed solid phase extraction technique was used to extract,purify,and concentrate the target substance,and then gas chromatography was carried out.The results show that the separation of pesticide residues and the linear relationship are good.The correlation coefficient is over 0. 999 and RSD is less than 5%,and the actual sample detection rate is between 75% and 95%.This method has high sensitivity,fast and simple operation,complete purification,and the recovery rate is between 94. 5% and 99. 2%.The results are satisfactory.The method can be applied to the screening and quantitative detection of organochlorine and pyrethroid pesticide residues in meat products.