摘要
采用顶空固相微萃取-气质联用(HS-SPME-GC/MS)技术建立草莓中二嗪农、倍硫磷、杀螟硫磷、乙基对硫磷和乙硫磷5种有机磷农药的快速测定方法,实验优化了HS-SPME萃取条件和GC-MS条件。结果表明:各组分标准曲线方程为:二嗪农y=23.928x+80.891;倍硫磷y=90.368x-886.061;杀螟硫磷y=25.992x+123.012;乙基对硫磷y=92.246x-431.352;乙硫磷y=62.134x+486.49。线性相关系数R为0.989～0.998,精密度(n=5)为7.2%～12.7%,方法检出限为5.2～10.7μg/kg,加标回收率为76%～94%。该方法快速、灵敏、准确、试剂用量少,且各项方法学指标符合检测要求,适合作为食品安全监管与检验的标准方法。
A headspace solid-phase microextraction （HS-SPME） method in combination with GC-MS was developed for the rapid determination of diazinon, fenitrothion, fenthion, parathion ethyl and ethion in strawberries. The operating conditions of HS-SPME and C-C-MS were optimized. A good linear relationship was found to each of the organophosphorus pesticides and the correlation coefficients were in the range of 0.989 - 0.998. The precision for determining the organophosphorus pesticides by this method （n = 5） varied from 7.2% to 12.7% and the limits of detection were 5.2 - 10.7μg/kg. The spike recoveries ranged 76% - 94%. This method demonstrates many advantages including promptness, sensitivity, accuracy and low solvent consumption and therefore is able to meet the demand for determination of pesticide residues.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2009年第14期191-193,共3页
Food Science
基金
河北省科技攻关项目(05547004D-5)
河北省科技支撑计划项目(07276709D)
关键词
草莓
顶空固相微萃取
气质联用
有机磷
快速测定
strawberry
headspace solid-phase microextraction
gas chromatography-mass spectrometry organophosphorus
rapid detection
