A modification of differential pulse voltammetry has been proposed and tested. In the modified version, currents are measured at two different times during each pulse, and their difference is computed and displayed. The resulting voltammogram has the same characteristics as those obtained In the normal manner except that the magnitude of the peak is somewhat smaller. More Importantly, background current of the type observed with platinum electrodes at positive potentials Is dramatically suppressed. The result Is an Improved signal-to-background ratio for samples undergoing oxidation at potentials more positive than about +1.5 V vs. SCE. The technique has been evaluated through the study of reversible (9,10-dlphenylanthracene) and irreversible (2,4,6-trl-ferf-butylphenol, m-anlsaldehyde, Isobutyraldehyde) oxidations at platinum In acetonitrile spanning potentials from +1.2 to +2.9 V vs. SCE. The modification resulted In about a 5-fold Increase In signal-to-background ratio for m-anlsaldehyde and isobutyraldehyde.