ANODIC-STRIPPING VOLTAMMETRY AT A HYDRODYNAMIC MERCURY-ELECTRODE UNDER HIGH-MASS TRANSPORT CONDITIONS - 2 - EXPERIMENTAL-VERIFICATION OF THEORY AND IMPLICATIONS FOR SONOVOLTAMMETRY

Anodic stripping voltammetry experiments were carried out in aqueous l ead solution using square wave voltammetry at insonated mercury thin f ilm electrodes and compared to numerical theory developed in an earlie r paper (Ball, J. C.; Compton, R. G. J. Phys. Chem. B 1998, 102, 3967) . Excellent agreement was obtained under very fast mass transport cond itions corresponding to the small (similar to micrometer) diffusion la yer thickness obtained under power ultrasound. The results provide fur ther confirmation that the dominant contribution to the mass transport arises from diffusion layer thinning due to acoustic streaming except under extreme conditions. The choice of optimal square wave frequency under these conditions was investigated.