The adsorption of methyl red at the dropping mercury electrode

Abstract

Surface excess concentrations of methyl red at the mercury-solution interface have been determined at pH 7.00, 9.80, and 12.30 from electrocapillary measurements using 0.lM sodium nitrate as supporting electrolyte. The results are interpreted in terms of a reorientation of the methyl red anion between -0.4 V and -0.6 V (v. S.C.E.)