离子色谱-电感耦合等离子体质谱同步分离测定环境水中砷、铬、溴、碘的10种形态  

Simultaneous Determination of Ten Ionic Species of Arsenic,Chromium,Bromine,and Iodide in Environmental Water by Ion Chromatography Inductively Coupled Plasma Mass Spectrometry

作　　者：杏朝刚 王娇娇 黄锦春 袁京群 毛翎姿 李士敏 XING Chaogang;WANG Jiaojiao;HUANG Jinchun;YUAN Jingqun;MAO Lingzi;LI Shimin(Analysis Center of Agrobiology and Environmental Sciences of Zhejiang University,Hangzhou 310058;Zhejiang Agriculture and Forestry University,Zhoushan 311300;University of California,Berkeley 94720,USA)

机构地区：[1]浙江大学农生环测试中心,浙江杭州310058 [2]浙江农林大学,浙江杭州311300 [3]加州大学伯克利分校,美国伯克利94720

出　　处：《分析科学学报》2023年第2期207-212,共6页Journal of Analytical Science

基　　金：浙江大学实验技术研究项目(No.SJS202017)。

摘　　要：建立了离子色谱-电感耦合等离子体质谱(IC-ICP-MS)联用技术,用于测定环境水中亚砷酸根、砷酸根、一甲基砷(MMA)、二甲基砷(DMA)、三价铬、铬酸根、溴离子、溴酸根离子、碘离子、碘酸根离子。使用Hamilton PRP-X100阴离子交换色谱柱,在流速1.4 mL/min、5%甲醇-40 mmol/L NH_(4)NO_(3)流动相(pH=8.6)等度洗脱条件下,20 min内实现了砷、铬、溴、碘4种元素10种形态的分离检测。10种元素形态检出限在0.1~2μg/L之间,定量限在0.5~6μg/L之间,平均加标回收率在75.4%~104.7%之间,相对标准偏差(RSD,n=3)在0.91%~4.96%之间。该方法可以用于环境水样中砷、铬、溴、碘4种元素10种形态的常规分析检测。A method was established for speciation analysis of arsenite(As(Ⅲ)),arsenate(As(Ⅴ)),monomethyl arsenic(MMA),dimethyl arsenic(DMA),trivalent chromium(Cr(Ⅲ)),hexavalent chromium(CrO_(4)^(2-)),bromide(Br-),bromate(BrO_(3)^(-)),iodide(I-),iodate(IO_(3)^(-))in environmental water,by ion chromatography(IC)with inductively coupled plasma mass spectrometry(ICP-MS).The separation of arsenic,chromium,bromine and iodide elements species was carried out with a Hamilton PRP-X100 ion chromatography column by isocratic elution using 40 mmol/L NH_(4)NO_(3)and 5%methanol(pH=8.6)as mobile phase,at a flow rate of 1.4 mL/min.The analysis of 10 elements species could be completed within 20 minutes,the limits of detection and quantification were in the range of 0.1-2μg/L and 0.5-6μg/L,respectively.The recoveries of the target species were in the range of 75.4%-104.7%and the relative standard deviations(n=3)were between 0.91%-4.96%.The method can be applied to the daily analysis of 10 species of four elements of arsenic,chromium,bromine and iodine in environmental water.

关 键 词：离子色谱 电感耦合等离子体质谱 环境水 元素形态 等度洗脱 

分 类 号：O657.63[理学—分析化学]