Effects of mixed adsorption layers of 6-mercaptopurine – Triton X-100 and 6-mercaptopurine – Tween 80 on the double layer parameters at the mercury/chlorates(VII) interface

Abstract The mixed adsorption layers of 6-mercaptopurine (6MP) and neutral detergents at the mercury/chlorates(VII) interface are described. The adsorption parameters for the double electrical layer were calculated from the differential capacity measurements extrapolated to zero frequency. It was found that 6-mercaptopurine dominates in the formation of adsorption equilibria of the studied mixture. Competitive adsorption between the 6-mercaptopurine-Triton X-100 and 6-mercaptopurine – Tween 80 or mixed micelles cannot be excluded.