摘要
基于凝胶渗透色谱(GPC)对脂类优良的分离能力,研究了其对有机氯、有机磷、氨基甲酸酯、拟除虫菊酯等多种类型农药与油脂基体的分离行为,建立了一种可同步测定食用植物油中4种类型共29种农药残留的分析方法。样品用凝胶渗透色谱提取净化,然后用自动快速浓缩仪浓缩后直接用气相色谱-质谱法(GC-MS)测定,其在0.05、0.10、0.20mg/kg3个添加水平的平均回收率为82%～119%,相对标准偏差为1.35%～10.2%,29种农药方法检出限和定量下限分别为0.1～10.0μg/kg和0.4～33.0μg/kg,可以满足食用植物油中农药残留限量的检测要求。
The separation behaviors of organochlorine pesticides, organophosphorus pesticides, carb- mate pesticides and pyrethriod pesticides and oil matrixes were systematically investigated with gel permeation chromatography （ GPC ） for its outstanding capability of moving lipid. A novel method was proposed for simultaneous determination of 29 pesticides in edible vegetable oils by GC -MS coupled with GPC. The samples were cleaned up by GPC and analyzed by GC - MS. A good linearity was observed for all compounds in the concentration range investigated with correlation coefficients of 0. 990 5 -0. 999 5. The recoveries of 29 pesticides at three spiked concentrations of 0. 05, 0. 10 and 0. 20 mg/kg were between 82% and 119% with RSDs in the range of 1.35% - 10. 2%. The detec- tion limits and quantitation limits of 29 pesticides were 0. 1 - 10. 0 μg/kg and 0. 4 -33.0μg/kg, re- spectively. The simplicity, sensitivity and good precision of the method made it be well suitable for the analysis of multi-pesticides in edible vegetable oils.
出处
《分析测试学报》
CAS
CSCD
北大核心
2009年第1期67-71,共5页
Journal of Instrumental Analysis
基金
长江学者和创新团队发展计划资助项目(IRT0540)
