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气相色谱-质谱法测定蔬菜与水果中11种三唑类农药残留

Journal of Instrumental Analysis(2011)

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Abstract
建立了蔬菜和水果中11种三唑类农药残留的气相色谱-质谱(GC - MS)测定方法.样品用乙腈均质提取,经石墨化炭黑/氨基复合柱净化,乙腈-甲苯(3:1)洗脱.洗脱液经浓缩、溶剂交换后定容,采用气相色谱-质谱的选择离子监测方式( GC - MSD/SIM)进行测定,内标法定量.方法的线性范围为0.05~5 ng,相关系数为0.996~1.000,对甘蓝、番茄、苹果、柑橘、菠菜5种空白基质分别进行0.01、0.05、0.10 mg/kg 3个水平加标,平均回收率为80%~ 97%,相对标准偏差(RSD,n=10)为2.5% ~ 8.4%.11种农药的检出限均为0.01 mg/kg.该方法操作简单,灵敏度高,结果准确可靠.
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Pesticide Residues
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