Rapid data acquisition in rotating disk voltammetry. II

Summary By use of a square-root device and a motor rotation rate programmer, direct plots of limiting current, i lim vs. square root of rotation rate, ω 1/2 , can be obtained on an ordinary X-Y recorder. Various rates of increase in motor rotation speed are available in order to circumvent problems such as electrode filming. Optimum conditions for the rate of increase were tested, as were the effects of solution volume. The technique can be used to detect homogeneous chemical reactions associated with electron transfer processes, but the primary use is in the rapid acquisition of large amounts of data relating limiting currents to rotation rates.