%0 Journal Article
%T Microchip Capillary Electrophoresis-Electrochemical Detection of Nitrite Using A Modified Carbon<br>NO-2的芯片毛细管电泳-修饰碳糊电极电化学检测
%A WEI Peihai
%A LI Guanbin
%A Chen Liren
%A <br>魏培海
%A 李关宾
%A 陈立仁
%J 色谱
%D 2005
%I 
%X Carbon paste electrode modified with 3-mercaptopropyltrimethoxysilane copper (MPTMS-Cu) encapsulated in molecular sieve MCM-41 was prepared. The electrocatalytic behavior of the modified electrode towards the reduction of nitrite was studied in detail, including pH-dependence and composition-dependence studies. A microchip capillary electrophoresis-electrochemical detection system with the modified carbon paste as electrode was fabricated. The application of the system for the detection of nitrite is discussed. The detection was finished within 40 s under the following conditions: 50 mmol/L sodium acetate buffer at pH 5.8, -1.6 kV running voltage. The peak current was linear with the concentration of nitrite over 10.0 micromol/L-5.0 mmol/L and the detection limit was 4.0 micromol/L in pure water.
%K microchip capillary electrophoresis
%K modified carbon paste electrode
%K nitrite
%K electrochemistry<br>芯片毛细管电泳
%K 修饰碳糊电极
%K NO-2
%K 电化学
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=6579068328FE643F&jid=4D81E042D77AFEC6881D14759692069C&aid=C0238385DB2A1BDB&yid=2DD7160C83D0ACED&vid=EA389574707BDED3&iid=38B194292C032A66&sid=B799C1769FCACDC8&eid=89AC6B0ADBEA2741&journal_id=1000-8713&journal_name=色谱&referenced_num=0&reference_num=13