摘要
目的建立蔬菜和水果中22种有机磷农药多种残留量固相萃取-毛细管柱气相色谱的方法。方法样品匀浆后,经混合溶剂提取,CARB/NH2柱固相萃取净化,外标法定量,用双柱保留时间法对复杂样品中有机磷农药定性。结果在0.10～2.0μg/ml线性范围内,有机磷农药各组分的相关系数≥0.999 0,检出限为0.001 2～0.011 0 mg/kg,平均回收率为89.2%～105%,相对标准偏差均≤7.43%。与GB/T 5009.20—2003进行比较,测定结果差异无统计学意义(P>0.05)。结论该方法样品净化完全,杂质干扰少,前处理操作简单,定量准确重现性好,适合蔬菜和水果中多组分有机磷农药残留的同时测定,易于推广应用。
Objective To establish a method for the determination of 22 organophosphorus pesticides multiresidues in vegetables and fruit by solid phase extraction-capillary gas chromatography.Methods After the samples were homogenized,purified through CARB/NH2 solid phrase extraction,external standards were used for quantitative determination.Organophosphorus pesticide in complex samples could be determined by reserve time with dual-column of GC.Results The linear range was 0.10-2.0 μg/mg.Correlation coefficients of the multiresidues were all above 0.999 0,the limit of detection ranged 0.001 2-0.011 mg/kg,the average rates of recovery were 89.2%-105%,the relative standard deviations of the method were below 7.43%.No significant differences were seen between the results of this method and those of the national standard methods.（P0.05）.Conclusion The method has the advantages of complete purification,simple and ideal accuracy and is applicable to the simultaneous determination of organophosphorus pesticide residues in the vegetables and fruit.
出处
《环境与健康杂志》
CAS
CSCD
北大核心
2010年第12期1090-1093,共4页
Journal of Environment and Health
关键词
色谱法
气相
固相萃取
蔬菜
水果
有机磷农药
Chromatography
gas
Solid phase extraction
Vegetables
Fruit
Organophosphorus pesticide
