Abstract
An electronic triangular wave generator is described, for use at controlled electrode potential. The control gives an initial stability of ±1 mV and ensures, during scanning, a linear time variation of the potential imposed on the electrode, for currents up to 10 mA, in spite of ohmic drop in the circuit. The speed of scanning is variable from 0.01 to 1500 V/sec; the initial potential and the width of potential scan can be varied from + 1·5 V to - 1·5 V and from 0 to 1.5 V respectively. Reduction curves for T1+ on a pool electrode of mercury, obtained with a scanning rate between 0·05 and 1500 V/sec, are analysed, and compared with those calculated from the theoretical equation of Randles, Sevcik and Matsuda. For scanning rates ng 100 V/sec, the agreement is very good. The reproducibility is ± 2 mV.
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