High sensitivity flow injection analysis of urea using composite electropolymerized polypyrrole-polyion complex film

被引：24
|
作者：
Osaka, T [1 ]
Komaba, S
Fujino, Y
Matsuda, T
Satoh, I
机构：
[1] Waseda Univ, Sch Sci & Engn, Dept Appl Chem, Tokyo 1698555, Japan
[2] Waseda Univ, Kagami Mem Lab Mat Sci & Technol, Tokyo 1698555, Japan
[3] Kanagawa Inst Technol, Fac Engn, Dept Appl Chem, Atsugi, Kanagawa 2430292, Japan
来源：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1999年 / 146卷 / 02期
关键词：
D O I：
10.1149/1.1391652
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A highly sensitive and rapid flow injection system for urea analysis was constructed with a composite film of electropolymerized inactive polypyrrole (PPy) and a polyion complex incorporating urease. This system shows a sensitivity of 120 mV decade(-1) and a lifetime of more than 80 assays. The origin of the high sensitivity of this system is attributed to an additional potential response of inactive PPy to ammonia or ammonium ion superimposed on the response to pH change. By injecting a concentrated buffer solution immediately after the sample injection, this system is capable of assaying more than 15 samples per hour. (C) 1999 The Electrochemical Society. S0013-4651(98)05-073-3. All rights reserved.
引用
收藏
页码：615 / 619
页数：5
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