%0 Journal Article
%T Spectrophotometric determination of micro-cadmium in water after ionic liquid extraction<br>离子液体萃取光度法测定水中微量镉
%A LI Shan
%A CHEN Zhen
%A WANG Qian
%A WANG Ying-hua
%A <br>李姗
%A 陈珍
%A 王千
%A 王英华
%J 冶金分析
%D 2012
%I 
%X A new extraction spectrophotometry for the determination of micro-cadmium was proposed.In Na2B4O7-NaOH buffer medium at pH 10.8,the Cd-Cadion complex formed by 1-(4-nitrobenzophenone)-3-(4-phenylazophenyl)-triazene(Cadion) and Cd2+ could be extracted by little ionic liquid(1-butyl-3-methylimidazole hexafluorophosphate,).After centrifugal separation,the content of cadmium in ionic liquid phase was directly determined by spectrophotometry at maximum absorption wavelength(517 nm).The linear range of this method was 1.0-62.5 ng/mL,the detection limit was 0.22 ng/mL,apparent molar absorptivity was 6.9×105 L·mol-1·cm-1,the enhancement factor was 29.5,and the relative standard deviation(RSD,50 ng/mL,n=6) was 2.1 %.The proposed method was directly applied to the determination of micro-cadmium in water sample with recoveries of 96.7 %-108.5 %.
%K ionic liquid
%K extraction
%K cadmium
%K cadion
%K spectrophotometry<br>离子液体
%K 萃取
%K 镉
%K 镉试剂
%K 分光光度法
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=2D0EECBAB3CF5455&jid=801503686266675EACDCAD01FB961264&aid=09A83131469FC5D4A625E7C2765D75C2&yid=99E9153A83D4CB11&vid=9971A5E270697F23&iid=0B39A22176CE99FB&sid=D3E34374A0D77D7F&eid=4AD960B5AD2D111A&journal_id=1000-7571&journal_name=冶金分析&referenced_num=0&reference_num=0