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.
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)
出处
《分析科学学报》
CAS
CSCD
北大核心
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)。
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
Ion chromatography(IC)
Inductively coupled plasma mass spectrometry(ICP-MS)
Environmental water
Element species
Isocratic elution
作者简介
通讯作者:李士敏,男,副教授,研究方向:食品和生物医药分析检测方法研究和技术开发.E-mail:shiminli@zju.edu.cn。
