一种测定棉花中脱叶剂类农药残留量的方法  

A Method to Test the Pesticide Residue of Defoliant Category in Cotton

作　　者：何艳丽[1] 郭会清 孙武勇 魏东伟[1] 禹建鹰 

机构地区：[1]河南农业大学,河南郑州450002 [2]河南出入境检验检疫局,河南郑州450003

出　　处：《棉纺织技术》2016年第11期44-47,共4页Cotton Textile Technology

基　　金：质检公益性行业科研专项(201410076)

摘　　要：探讨高效液相色谱-串联质谱定量测定棉花纤维中噻苯隆、敌草隆和环丙酸酰胺3种脱叶剂类农药残留的效果。样品经甲醇提取后浓缩至干,在电喷雾负离子多反应监测模式下进行检测,外标法定量。在优化试验条件后,该测量方法的线性范围为5μg/L^100μg/L,相关系数r2大于0.99。经测试,3种脱叶剂的加标回收率为80.2%~105.7%,相对标准偏差为3.6%~12.1%。认为该方法准确,简便,灵敏度高,可作为棉花纤维中脱叶剂类农药残留的可靠检测方法。Effect of testing pesticide residue of three defoliant categories including thidiazuron,diuron and cy- clanilide in cotton fiber by high performance liquid chromatography tandem mass spectrometry was discussed. The sample was extracting by methyl alcohol then concentrated and dried. Detection was performed under monito- ring mode of negative electrospray ionization multiple reaction. External standard method was adopted for quanti- ration. After optimizing the test conditions, the linear range of the test method was 5 μg/L-100 μg/L and the correlation coefficient rz was larger than 0.99. After testing,the adding standard recoveries of the three defoliant were 80.2% - 105. 7% and the standard deviations were 3.6%-12.1%. It is considered that the test method is accurate,simple and with higher sensitivity. It can be used as a reliable method to test pesticide residue of defoli- ant category in cotton fibers.

关 键 词：高效液相色谱-串联质谱法 棉花纤维 脱叶剂 加标回收率 标准偏差 检出限 

分 类 号：TS111.9[轻工技术与工程—纺织材料与纺织品设计]