%0 Journal Article
%T Determination of nitrite by layer-by-layer self-assembly nano-gold/ thionine modified glassy carbon electrode<br>层层自组装纳米金/硫堇修饰玻碳电极测定亚硝酸根
%A HAN Jin-tu
%A WANG Lan
%A WU Zhi-wei
%A HUANG Ke-jing
%A WANG Meng
%A <br>韩金土
%A 王兰
%A 吴志伟
%A 黄克靖
%A 王蒙
%J 冶金分析
%D 2012
%I 
%X The preparation of nano-gold / thionine multilayer film modified glassy carbon electrode and the electrochemical behavior of nitrite on this electrode were studied.The glassy carbon electrode was activated by potentiostatic method in dilute nitric acid solution to generate oxygen-bearing groups(such as-COH) on electrode surface.Then,the electrode was immersed in thionine solution.The schiff alkali reaction occurred between-NH2 in thionine with-COH on glassy carbon electrode surface to immobilize of thionine on electrode.Finally,the nano-gold was modified on the surface of the electrode immersed in a nano-gold solution by interreaction of nano-gold with thionine,realizing the preparation of nano-gold / thionine multilayer film modified glassy carbon electrode.The experimental results showed that,this modified electrode could significantly accelerate the electrochemical process of nitrite on electrode surface.The electrochemical response signal was linear to the concentration of nitrite in range of 2×10-6-5.0×10-5 mol/L and 5.0×10-5-2.0×10-3 mol/L.The detection limit of nitrite was 5×10-8 mol/ L(S/N=3).The proposed method was applied to the determination of nitrite in water samples with relative standard deviations of 2.2%-3.2% and recoveries of 98%-104%.
%K layer-by-layer self-assembly
%K nano-gold
%K thionine
%K nitrite
%K chemically modified electrode<br>层层自组装
%K 纳米金
%K 硫堇
%K 亚硝酸根
%K 化学修饰电极
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=2D0EECBAB3CF5455&jid=801503686266675EACDCAD01FB961264&aid=09A83131469FC5D4359122793E4FBE11&yid=99E9153A83D4CB11&vid=9971A5E270697F23&iid=0B39A22176CE99FB&sid=BCA2697F357F2001&eid=659D3B06EBF534A7&journal_id=1000-7571&journal_name=冶金分析&referenced_num=0&reference_num=0