超高效液相色谱-串联质谱法同时检测水中16种芳氧苯氧丙酸酯类除草剂

采用固相萃取-超高效液相色谱-串联质谱法(UPLC-MS/MS)通过对固相萃取柱、洗脱液、流动相等的优化,建立了水中16种芳氧苯氧丙酸酯类(APP)除草剂的分析方法。确定以Oasis HLB为固相萃取柱、丙酮-正己烷(1∶1,V/V)为淋洗液、水-乙腈(3∶7,V/V)为流动相进行水样预处理,在最优条件下,各目标物在水中的回收率均达到74.5%~124.9%,相对标准偏差为4.2%~9.6%,线性范围为1~2 000μg/L,各目标物标准品在UPLCMS/MS系统中有效的线性相关系数(R2)达到0.998以上。该方法具有检测限低、回收率高等优点,经实际样品测试,可适用于水中16种APP类除草剂的同时检测。

Simultaneous Determination of 1 6 Kinds of Aryloxyphenoxypropionate Herbicides in Water Using Ultra Performance Liquid Chromatography-Tandem Mass Spectrometry

This paper develops an analytical method for simultaneous determination of 1 6 aryloxyphe-noxypropionate (APP)herbicides in water samples by solid phase extraction-ultra high performance liquid chromatography-tandem mass spectrometer (UPLC-MS/MS).The paper determines the Oasis HLB as the solid phase extraction cartridge,acetone-hexane (1∶1 ,V/V)as the washing solution,water-acetonitrile (3∶7 ,V/V)as the mobile phase for water sample pretreatment and chromatographic separation.Based on the optimized sample pretreatment procedures and separation condition,the recovery rate of all the target analytes ranges from 74.5 to 124.9% in water with the relative standard deviation (RSDs)ranging from 4.2% to 9.6% and the linear ranging from 1 to 2000μg/L with correlation coefficients (R2 )above 0.998. The method can be applied to simultaneous determination of 1 6 kinds of APP herbicides in water due to low detection limit and high recovery.