Stability of selenium and its speciation analysis in water using automatic system separation and HR-ICP-MS measurement  

作　　者：Junqiang Yang Yawen Chen Keliang Shi Kesheng Hu Run Li Xiaoqing Gao Qian Wang Weibo Zhang Yun Zhou Yanyun Wang Jiangang He Tonghuan Liu Xiaolin Hou 

机构地区：[1]Frontier Science Center for Rare Isotopes,Lanzhou University,Lanzhou 730000,China [2]School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China [3]Beijing National Laboratory for Molecular Sciences,Fundamental Science Laboratory on Radiochemistry&Radiation Chemistry,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China [4]Key Laboratory of Special Function Materials and Structure Design,Ministry of Education,Lanzhou University,Lanzhou 730000,China [5]CNNC Lanzhou Uranium Enrichment Co.,Ltd.,Lanzhou 730000,China [6]Environmental Monitor Center of Gansu Province,Lanzhou 730000,China

出　　处：《Chinese Chemical Letters》2022年第7期3444-3450,共7页中国化学快报（英文版）

基　　金：The financial support from National Natural Science Foundation of China(Nos.22061132004,U21A20442,22106059,22106057,21771093);Fundamental Research Funds for the Central Universities of China(No.lzujbky-2021-kb11,lzujbky-2021-sp41);Gansu guiding program of Science and Technology Innovation(No.20JR10RA610)are gratefully appreciated。

摘　　要：A simple and convenient method has been developed for the pre-concentration and separation of inorganic selenium species from environmental water samples using anion exchange chromatographic column combined with high resolution inductively coupled plasma mass spectrometry(HR-ICP-MS)measurement.^(75)Se(Ⅳ) and ^(75)Se(Ⅵ)were prepared and used as tracers during the experiments.The volatility of selenium during solution evaporation was investigated to establish a reliable water samples pretreatment procedure.The parameters which affect the uptake of Se(Ⅳ)and Se(Ⅵ)on Dowex1×8 resin was optimized and the procedure for Se(Ⅳ)and Se(Ⅵ)separation was proposed.Both Se(Ⅳ)and Se(Ⅵ)are retained on the column in natural or alkaline solution with high distribution coefficient.The successive gradient elution of pre-concentrated species of selenium with HNO_(3)solution allows to differentiate between them.Se(Ⅳ)and Se(Ⅵ)finally were eluted with 0.05 mol/L HNO_(3) and 5.0 mol/L HNO_(3),respectively.The proposed method has been successfully verified using the certified reference materials(CRMs)of real water samples,and spiked recoveries for real samples were 98%-104%with 5%relative standard deviations(RSDs).The developed procedure is proved to be reliable and can be used for the rapid determination of selenium species in environmental water samples.

关 键 词：Inorganic selenium SPECIATION Automatic system separation Rapid determination Water sample 

分 类 号：X832[环境科学与工程—环境工程] O657.63[理学—分析化学]