离子色谱-电感耦合等离子体质谱法测定地下水中4种形态砷的含量  

IC-ICP-MS Determination of 4 Arsenic Species in Groundwater

作　　者：贾娜[1] 韩梅[1] 李科[1] 刘冰冰[1] 赵国兴[1] 

机构地区：[1]中国地质科学院水文地质环境地质研究所,正定050803

出　　处：《理化检验（化学分册）》2016年第3期292-295,共4页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：中国地质科学院水文地质环境地质研究所基本科研业务费项目(SK201406)

摘　　要：采用离子色谱-电感耦合等离子体质谱法（IC-ICP-MS）测定地下水中4种形态砷[As（Ⅲ）、As（Ⅳ）、一甲基胂酸、二甲基胂酸]的含量。水样在IonPac AS14阴离子色谱柱上分离,采用IonPac AG14阴离子保护柱,以碳酸氢铵为流动相进行梯度洗脱,4种砷形态在15min内完全分离。在进样量25μL时,4种形态砷的线性范围为0.50～200μg·L-1,检出限在0.03～0.06μg·L-1之间,加标回收率在97.0%～102%之间。此方法用于测定地下水样,测定结果与电感耦合等离子体质谱法的结果相吻合。The 4arsenic species[As（Ⅲ）,As（Ⅳ）,MMA and DMA]in ground water were simultaneous determined by anion exchange chromatography coupled with inductively coupled plasma mass spectrometer.The 4arsenic species were separated on an IonPac AS14 anion exchange column successfully within 15 min using IonPac AG14 anion guard column,with ammonium bicarbonate as mobile phase for gradient elution.Under 25μL of injection volume,the linearity ranges of the 4arsenic species were 0.50-200μg·L^（-1）,with detection limits in the range of 0.03-0.06μg·L^（-1）.Recoveries obtained by standard addition method were in the range of 97.0%^（-1）02%.The proposed method was applied to analysis water samples,giving results in constant with those obtained by ICP-MS.

关 键 词：离子色谱-电感耦合等离子体质谱法 砷 形态 地下水 

分 类 号：O657.63[理学—分析化学]