摘要
采用标准加入法的改进计算公式定量,建立了苹果中毒死蜱、戊唑醇的气相色谱-串联质谱(GC-MS/MS)检测方法。前处理用乙腈提取,分散固相萃取净化,复溶后经气相色谱-串联质谱测定。在0.02~0.1 mg/L范围内,毒死蜱、戊唑醇线性关系良好,相关系数大于0.999,方法定量限为0.001~0.003 mg/kg。3个添加水平下的苹果样品的平均回收率为96.3%~106.0%,相对标准偏差为3.3%~4.9%。与传统计算公式相比,改进计算公式测定样品中毒死蜱、戊唑醇残留量z值更小,准确性更强,适合于样品含量的准确定量。
A method was developed for the determination of chlorpyrifos and tebuconazole in apples by gas chromatography-tandem mass spectrometry(GC-MS/MS).The sample was extracted by acetonitrile,purified by dispersed solid phase extraction(dSPE)and redissolved by GC-MS/MS.The linear relationship between chlorpyrifos and tebuconazole was good in the range of 0.02-0.1 mg/L.The correlation coefficient was greater than 0.999,and the limit of quantification was 0.001-0.003 mg/kg.The average recoveries were 96.3%-106.0%and the relative standard deviations were 3.3%-4.9%.Compared with the traditional formula,the improved formula has smaller Z value and better accuracy,and is suitable for accurate determination of chlorpyrifos and tebuconazole in samples.
作者
武源
覃慧丽
WU Yuan;QIN Huili(Liuzhou quality inspection and testing research center,Guangxi Liuzhou545006,China)
出处
《现代农药》
CAS
2021年第4期40-44,共5页
MODERN AGROCHEMICALS
关键词
标准加入法
改进计算公式
准确定量
standard addition method
improved calculation formula
accurate quantification
