Computerized Scanning Voltammetric Detector for Capillary Electrophoresis

Abstract

Abstract: This work describes the development of a scanning voltammetric detector for capillary electrophoresis. The scanning electrode potential waveform generation and the current signal acquisition are controlled by a microcomputer interfaced with a home-made card which is equipped with 12 bit digital-analog converter(D/A) and a 12 bit analog-digital converter (A/D). The D/A is connected to a Ag/AgCl reference electrode and used to control the cell potential via a voltammeter, and the A/D is connected to the working electrode for data acquisition. The methods of potential control and signal acquisition are discussed. An example of separating mixture of p-diphenol and pyrocatechol is demonstrated. The results obtained are satisfactory.

Key words: Capillary electrophoresis, Microcomputer controlling, Scanning voltammetric detector

CLC Number:

O657.8

TrendMD:

WANG Li-Shi, YANG Xiao-Yun, MO Jin-Yuan, ZOU Xiao-Yong . Computerized Scanning Voltammetric Detector for Capillary Electrophoresis[J]. Chem. J. Chinese Universities, 1999, 20(5): 713.

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Computerized Scanning Voltammetric Detector for Capillary Electrophoresis

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