摘要
建立了悬浮固化-分散液液微萃取-气相色谱法测定野木瓜中9种有机氯农药残留量的方法。样品经石油醚提取、浓硫酸净化、悬浮固化-分散液液微萃取法浓缩后,用气相色谱-电子捕获检测器（GC-ECD）检测,外标法定量。结果表明,9种农药含量在1～100μg/L范围内线性关系良好,相关系数R2在0.99以上,方法检出限（S/N=3）为0.01～0.07μg/kg。9种有机氯农药在1.75,7.00,28.0μg/kg 3个水平添加下,平均回收率范围为83.3%～116.7%,相对标准偏差（RSD）范围为1.5%～14%,方法已用于野木瓜中9种有机氯农药残留的测定。
A novel method for simultaneous determination of nine organochlorine pesticides in Stauntonia chinensis DC samples was established by dispersive liquid-liquid microextraction method based on solidation of floating organic droplet（ DLLME-SFO） coupled with gas chromatography（ GC）. The samples were extracted with petroleum ether,cleaned up with concentrated sulfuric acid,and concentrated by DLLME-SFO. The extracts were injected into the gas chromatography / electron-capture detection for analysis. Pesticide residues were quantified by external standard method. Under the optimized conditions,the results showed that the working curve of the method provided a good linearity in the range of 1 ～ 100 μg / L with a correlation coefficient 0. 99 for each pesticide. The limits of detection（ LOD） for this method were 0. 01 ～ 0. 07 μg / kg. The average spiked recoveries ranged from 83. 3% to 116. 7% at three concentration levels（ 1. 75,7. 00 and 28. 00 μg / kg） and the relative standard deviations（ RSDs） were 1. 5% ～ 14%. The proposed method is efficient and of high sensitivity,which was successfully applied to the determination for nine organochlorine pesticides in Stauntonia chinensis DC samples.
出处
《分析试验室》
CAS
CSCD
北大核心
2016年第7期850-853,共4页
Chinese Journal of Analysis Laboratory
基金
贵州省科技厅科学技术基金(黔科合J字LKS[2011]30号)
贵州省教育厅招标项目(黔教科(2011)018号)资助
作者简介
E-mail：kyyffs@163．com
