The development of a microcomputer controlled multielectrode potentiostat and a 32-electrode thin-layer flow-cell /

• Main Author: DeAbreu, Michael Paul
• Format: Others
• Language: en
• Published: McGill University 1988
• Subjects: Potentiostat > Design and construction > Evaluation; Voltammetry > Computer simulation; Electrochemical apparatus > Design and construction
• Online Access: http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=75690

The thin-layer flow-cell incorporated an array of 32 gold strip electrodes in a serial configuration opposite a platinum counter electrode. The cell body was made of Macor glass ceramic. A photolithographic procedure for etching the Macor and a simple method of applying a gold ink was devised. Resistive feedback current-to-voltage converters independently controlled the potential difference between the electrodes of the array and the common counter electrode. A microcomputer and a customized high speed data acquisition interface recorded the current response of each electrode. An expression for the faradaic response of a single electrode within a rectangular flow channel was modified to predict the behavior of the multi-electrode flow-cell. The quinone/hydroquinone redox system was used to evaluate the performance of the detector. Summing the signals from the array when all electrodes were held at the same potential improved the signal-to-noise ratio. Hydrodynamic curves were reconstructed from the currents measured at each electrode when a ramp potential profile was applied to the array.