【摘要】 建立蔬菜中克菌丹、灭菌丹和敌菌丹三种农药同时测定的气相色谱检测方法。样品用丙酮提取,经正己烷液液萃取,弗罗里硅土和石墨化碳黑混合柱净化,以具有电子捕获检测器(ECD)的气相色谱(GC)仪测定。方法在0.01、0.05、0.1mg/kg三个添加水平时的三种农药的平均回收率为克菌丹71.6%～100.2%、灭菌丹78.6%～104.6%、敌菌丹70.2%～86.9%、相对标准偏差为克菌丹8.5%～12.9%、灭菌丹5.1%～11.2%、敌菌丹8.7%～13.6%、方法定量限为克菌丹0.005mg/kg、灭菌丹0.003mg/kg、敌菌丹0.01mg/kg。更多还原

【Abstract】 A method using gas chromatography(GC) was presented for simultaneous determination of captan,folpet and captafol residues in vegetable.Samples were extracted with acetone and subjected to liquid-liquid extraction with n-hexane,followed by cleanup with column filled with florisil and graphitized carbon black.Finally the samples were determined by GC equipped with an electron capture detector(ECD).The limits of quantification for captan,folpet and captafol by this method were 0.005,0.003 and 0.01 mg/kg,respectively.The average recoveries for these pesticides in cabbage,radish and eggplant spiked at 0.01,0.05 and 0.1 mg/kg were 71.6%-100.2%,78.6%-104.6% and 70.2%-86.9%,respectively,and the coefficients of variation were 8.5%-12.9%,5.1%-11.2% and 8.7%-13.6%,respectively(n = 5).更多还原