Minicomputer control of measurements of spectroelectrochemical processes. Part 2. A New Measurement System for Simultaneous Coulometric and Spectrophotometric Investigations

The design of a system for simultaneous coulometric and spectrophotometric measurements is described. A special fiber optic cell is coupled to a rapid scanning spectrophotometer. The assembly is controlled by a Nova-2 minicomputer which simultaneously acquires and processes the data. The programmed measurement procedures enable spectrophotometric and coulometric curves to be recorded for linear or stepped sweep of the electrode potential, and kinetic relations to be found for a constant electrode potential. Test measurements on chlorpromazine and trifluoroperazine showed that the system is useful for studies of kinetics and mechanisms of electrode processes. The advantages and disadvantages of the method are discussed.