离子色谱-串联质谱法测定地下水中草甘膦、草铵膦和氨甲基膦酸  

Determination of glyphosate,glufosinate and aminomethylphosphonic acid in ground water by ion chromatography-tandem mass spectrometry

作　　者：覃晓媚 朱红霞[2] 姜振邦 袁懋[2] 薛荔栋[2] Qin Xiaomei;Zhu Hongxia;Jiang Zhenbang;Yuan Mao;Xue Lidong(Chongzuo Environmental Monitoring Station,Chongzuo 532200;China National Environmental Monitoring Center,Beijing 100012;SCIEX China,Beijing 100015)

机构地区：[1]崇左市环境保护监测站,崇左532200 [2]中国环境监测总站,北京100012 [3]SCIEX中国,北京100015

出　　处：《分析试验室》2020年第8期958-961,共4页Chinese Journal of Analysis Laboratory

摘　　要：采用离子色谱-串联质谱法测定了地下水中草甘膦、草铵膦和氨甲基膦酸,水样用0.22μm滤膜过滤后进样100μL,经Ionpac AS11-HC离子色谱柱分离,采用电喷雾串联四极杆质谱仪负离子多反应监测模式检测,外标法定量。结果表明,草甘膦、草铵膦和氨甲基膦酸分别在质量浓度为0.05~2.00μg/L,0.30~12.0μg/L,2.00~80.0μg/L范围内线性相关系数均大于0.999。草甘膦、草铵膦和氨甲基膦酸检出限分别为0.01,0.08,0.50μg/L,相对标准偏差为4.3%~15%,8.0%~10%,5.9%~7.7%,实际样品加标回收率为60.0%~100.0%,80.0%~118.3%,80.5%~109.0%。方法适用于地下水中草甘膦、草铵膦和氨甲基膦酸的测定。Glyphosate(GLY),glufosinate(GLUF)and aminomethyl phosphonic acid(AMPA)in ground water were analyzed by ion chromatography-tandem mass spectrometry(IC-MS/MS).Water samples were filtered through 0.22μm membrane.The injection volume was 100μL.Ionpac AS11-HC anion exchange column(250 mm×4 mm)was used with NaOH solution as eluent,and MS/MS(ESI^-)under multiple reaction monitoring(MRM)mode was adopted.Results showed that the concentrations of GLY,GLUF and AMAP had good linearity in the range of 0.05-2.00μg/L,0.30-12.0μg/L,and 2.00-80.0μg/L,respectively,with the correlation coefficients all above 0.999.The detection limits of GLY,GLUF and AMPA were 0.01,0.08 and0.50μg/L,respectively.The relative standard deviations(RSDs)of GLY,GLUF and AMPA were in the range of 4.3%-15%,8.0%-10%and 5.9%-7.7%,respectively.The sample recoveries of GLY,GLUF and AMPA were in the range of 60.0%-100.0%,80.0%-118.3%and 80.5%-109.0%,respectively.This method is suitable for the determination of GLY,GLUF and AMPA in ground water.

关 键 词：草甘膦 草铵膦 氨甲基膦酸 地下水 离子色谱-串联质谱 

分 类 号：X832[环境科学与工程—环境工程]