Selective Electrochemical Detection Using a Split Disk Array Electrode in a Thin-Layer Radial Flow System

Yuzuru Iwasaki, Osamu Niwa, Masao Morita, Hisao Tabei, Peter T. Kissinger

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

An eight-sector array (split disk) electrode was designed for a low flow rate (<100 μL/min) amperometric detector. This electrode was fabricated photolithographically for dimensional accuracy and reproducibility. This array of a pie-shaped electrode was combined with a thin-layer radial flow cell, and a conversion efficiency of 94% was achieved at the lowest flow rate tested (0.01 mL/min). Each electrode worked free from the effects of electrochemical reactions of the other electrodes. A coulometric hydrodynamic voltammogram of reversible redox species obtained using this system exhibited a Nernstian curve. These properties enabled this electrochemical detector to be used for determining the ratio of two redox species (redox potential difference ≈ 100 mV) with small injection volume (5 μL).

Original languageEnglish
Pages (from-to)3797-3800
Number of pages4
JournalAnalytical Chemistry
Volume68
Issue number21
DOIs
Publication statusPublished - 1996 Nov 1
Externally publishedYes

ASJC Scopus subject areas

  • Analytical Chemistry

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