摘要
目的:建立同时测定8种有机磷农药残留的方法。方法:采用乙腈提取,经蒸发浓缩,使用双柱(DB-17/HP-1)进行定性定量分析,使用GC-MS法进行确证。结果:8种有机磷在DB-17、DB-1色谱柱上可完全得到分离;工作曲线在0.5 mg/ml～2.0 mg/ml范围,相关系数为0.9970～0.9999;检出限0.007 mg/kg～0.126 mg/kg;加标回收实验显示,添加水平为0.05 mg/kg时,平均回收率81.1%～113.7%,RSD2.4%～14.1%;添加水平为0.50 mg/kg时,平均回收率86.8%～116.0%,RSD4.5%～11.7%。结论:本方法灵敏度符合GB 2763的评价需要,准确度和精密度与国标方法相当。
Objection：To establish one-time determination 8 kinds of organphosphorus pesticide residues in vegetables.Methods：The sample was withdrawn by acetonitrile,whereafter withdrawn liquid was evaporated and concentrated,detemine by HP-17/HP-1 double columns,gas chromatograph-mass spectrometer was used to verify the question sample.Results：8 kinds of organphosphorus can be separated completely;minimum determination limited range is 0.007 mg/kg～0.126 mg/kg;recover test（n=5） shows： Add level 0.05 mg/kg,average recover rate 81.1%～113.7%,RSD 2.4%～14.1%;Add level 0.50 mg/kg,average recover rate 86.8%～116.0%,RSD 4.5%～11.7%.Conclusion：The sensitivity matches the need of GB 2763 evaluation,the accuracy and precision is quite to the national health standard inspection procedure.
出处
《中国卫生检验杂志》
CAS
2010年第6期1366-1367,1582,共3页
Chinese Journal of Health Laboratory Technology
关键词
农药残留
有机磷农药
蔬菜
气相色谱法
Pesticide residue
Organ-phosphorus pesticide
Vegetable
Gas chromatography
