Potentiometric and voltammetric detection using a two-channel fountain cell.

The design and use of a two-channel fountain cell in potentiometric and voltammetric detection is described. The two flows produced two distinct sectors inside the thin layer region and one of the sectors was used as the internal electrolyte of a reference electrode built into the cell body and the other as the indicator/counter electrode section. The behavior of the flowthrough Ag/AgCl reference electrode was first investigated and found satisfactory and it was then employed as the reference electrode in the subsequent experiments.

Control of voltammetric experiments by means of the Commodore 64 microcomputer.

An electronic interface for the Commodore 64 microcomputer suitable for generation of voltammetric waveforms and for data acquisition has been built. Used together with analogue voltammetric instruments the interface makes updating of the measurement techniques possible. Also, fast A/D-conversion and a floppy disk drive make the system useful as a universal data-acquisition unit in the laboratory.