海水中6种均三氮苯类除草剂同步检测方法建立

The Method Establishment of Synchronous Detection of Six Triazine Herbicide Residues in Seawater using LC-MS/MS

本研究建立了海水中莠去津、莠灭净、西玛津、扑草净、氰草津和异戊乙净6种均三氮苯类除草剂农药残留的液相色谱-串联质谱(LC-MS/MS)同步检测方法。使用乙腈提取海水中均三氮苯类农药,采用新型纳米材料制作的SPE小柱对提取液进行净化,利用液相色谱-串联质谱法进行分析,外标法定量。结果显示,6种均三氮苯类除草剂在0.20、1.00和20.00μg/L水平下的平均添加回收率为65.40%~97.40%,相对标准偏差为0.89%~5.86%,方法定量限(灵敏度)为0.03~0.05μg/L。本研究建立的方法可用于海水中6种均三氮苯类除草剂的同步检测,具有快速便捷、准确可靠的优点。

A liquid chromatography tandem mass spectrometry(LC-MS/MS)method was established to synchronous detect six triazine herbicide residues in seawater,including atrazine,ametryn,simazine,prometryn,cyanazine and dimethametryn.The triazine pesticides in seawater were firstly extracted with acetonitrile,and the extraction solution were purified with SPE small column made with new nano materials.Then LC-MS/MS and external standard method were used to analyze and measure these six triazine pesticides.The results showed that the average recovery rates of these six herbicides were in the ranged of 65.40%–97.40%when the concentrations of these six triazine pesticides were 0.20 and 1.00 and 20.00μg/L,respectively,with the relative standard deviation of 0.89%–5.86%and the detection limit(sensitivity)of 0.03–0.05μg/L.This synchronous detection method could be applied for the determination of these six triazine herbicides in seawater,with the rapid,convenient,accurate and reliable advantages.