High Sensitivity Flow Injection Analysis of Urea Using Composite Electropolymerized Polypyrrole-Polyion Complex Film

Tetsuya Osaka, Shinichi Komaba, Yusuke Fujino, Tomoka Matsuda, Ikuo Satoh

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)615-619
Number of pages5
JournalJournal of the Electrochemical Society
Volume146
Issue number2
DOIs
Publication statusPublished - 1999

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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