Determination of Selenium in Water by Vortex-Assisted Cloud-Point Extraction Combination with Fluorescence Detection  

作　　者：JIAO Yurong LI Haifang 焦玉荣;李海芳(College of Chemistry and Chemical Engineering,Yulin University,Yulin 719000,China;Department of Chemistry,Beijing Key Laboratory of Microanalytical Methods and Instrumentation,Tsinghua University,Beijing 100084,China)

机构地区：[1]College of Chemistry and Chemical Engineering,Yulin University,Yulin 719000,China [2]Department of Chemistry,Beijing Key Laboratory of Microanalytical Methods and Instrumentation,Tsinghua University,Beijing 100084,China

出　　处：《Journal of Donghua University(English Edition)》2019年第5期487-492,共6页东华大学学报（英文版）

基　　金：Scientific Research Staring Foundation for the Returned Overseas Chinese Scholars,Ministry of Education of China(No.[2015] 1098);Cooperation of Production and Research Foundation of Science and Technology Bureau in Yulin,Shaanxi Province,China(No.2016CXY-02);Key Science and Technology of Program of Shaanxi Province,China(No.2017GY-131);Foundation of Yulin University for the Introduction of Talents,China(Nos.14GK23,17GK15)

摘　　要：A simple vortex-assisted cloud-point extraction(VA-CPE)method combined with the fluorescence(FL)strategy was developed to extract and determine inorganic Se(IV)in environmental water.Toluene was used as an extraction reagent,and Se(VI)was reduced to Se(IV)by subjecting its solution in 4 mol/L HCl to microwave heating for generating a yellow piazselenol complex using 3,3'-diaminobenzidine(DAB)and Se(IV).The concentration of the complex exhibited an excellent linear relation with the FL at 560 nm with an excitation wavelength of 420 nm.In addition,the effects of the toluene volume,pH,and VA-CPE parameters were investigated and the interference from coexisting ions was also studied.This method was successfully applied to determine the concentration selenium in environmental water samples with a detection limit of 0.05μg/L in the line range from 0.50μg/L to 50.00μg/L.A simple vortex-assisted cloud-point extraction( VA-CPE) method combined with the fluorescence( FL)strategy was developed to extract and determine inorganic Se( IV) in environmental water. Toluene was used as an extraction reagent,and Se( VI) was reduced to Se( IV) by subjecting its solution in 4 mol/L HCl to microwave heating for generating a yellow piazselenol complex using 3,3’-diaminobenzidine( DAB) and Se( IV). The concentration of the complex exhibited an excellent linear relation with the FL at 560 nm with an excitation wavelength of 420 nm. In addition,the effects of the toluene volume,p H,and VACPE parameters were investigated and the interference from coexisting ions was also studied. This method was successfully applied to determine the concentration selenium in environmental water samples with a detection limit of0.05 μg/L in the line range from 0.50 μg/L to 50.00 μg/L.

关 键 词：SELENIUM CLOUD-POINT extraction fluorescence(FL)derivatization 3 3'-diaminobenzidine(DAB) 

分 类 号：O658[理学—分析化学]