食品科学
• 安全检测 • 上一篇 下一篇
邓小娟1,李文斌2,晋立川2,顾春燕2,陈小平1,*
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国家自然科学基金青年科学基金项目(201506147)
DENG Xiaojuan1, LI Wenbin2, JIN Lichuan2, GU Chunyan2, CHEN Xiaoping1,*
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摘要:
建立QuEChERS快速净化结合气相色谱法测定牛奶中24 种有机氯及菊酯类农药残留的分析方法。样品经乙腈提取,QuEChERS法净化,气相色谱-电子捕获检测器分析,外标法定量。结果表明,待测物质在5~250 μg/L范围内线性关系良好,相关系数大于0.99,检出限为0.06~0.30 μg/kg,样品加标平均回收率为85.5%~111.2%,相对标准偏差为3.2%~10.8%。该方法简单、准确、高效,可用于牛奶样品中有机氯及菊酯类农药残留的快速筛查和定量检测。
关键词: QuEChERS, 气相色谱, 有机氯, 菊酯类农药, 牛奶
Abstract:
In this study, a modified quick, easy, cheap, effective, rugged and safe (QuEChERS ) approach was applied for the determination of 24 organochlorine pesticide and pyrethroid residues in milk samples by gas chromatography-electron capture detector (GC-ECD). Milk samples were extracted with acetonitrile, purified with the modified QuEChERS approach, and detected by GC-ECD. The external standard method was used for quantification. Excellent linearities were achieved for all target analytes in the range of 5–250 μg/L with correlation coefficients greater than 0.99. The limits of detection (LODs) ranged from 0.06 to 0.30 μg/kg. The recoveries were in the range of 85.5%–111.2%, with relative standard deviations (RSDs) less than 11%. In summary, the proposed method was simple, accurate, efficient and adequate for the rapid screening and quantitative analysis of organochlorine pesticide and pyrethroid residues in milk.
Key words: QuEChERS (quick, easy, cheap, effective, rugged and safe), gas chromatography, organochlorine, pyrethroid pesticide, milk
中图分类号:
O657
邓小娟,李文斌,晋立川,顾春燕,陈小平. QuEChERS-气相色谱法测定牛奶中24 种有机氯及菊酯类农药残留[J]. 食品科学, doi: 10.7506/spkx1002-6630-201618023.
DENG Xiaojuan, LI Wenbin, JIN Lichuan, GU Chunyan, CHEN Xiaoping. Determination of 24 Organochlorine and Pyrethroid Pesticide Residues in Milk by Modified QuEChERS Method and Gas Chromatography[J]. FOOD SCIENCE, doi: 10.7506/spkx1002-6630-201618023.
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https://www.spkx.net.cn/CN/Y2016/V37/I18/141