Über die inhibierende Wirkung grenzflächenaktiver Stoffe auf die polarographische Reduktion von Cd2+ -, Zn 2+ -und Co 2+ -Ionen in wasser-methanolischen und methanolischen Lösungen / On the Inhibition Effect of Surfactants on the Polarographic Reduction of Cd 2+ , Zn 2+ and Co 2+ Ions in Aqueous Methanolic and Methanolic Solutions

Abstract

The inhibition effect of tri-n-octylphosphine oxide (TOPO), triphenylarsine oxide (TAsO), triphenylphosphine oxide (TPO), triphenylarsine (TPAs) and triphenylphosphine (TPP) on the polarographic reduction of Cd2+, Zn2+ and Co2+ ions in aqueous methanolic and methanolic solutions has been studied. A different action of the inhibitors was obtained for each reducible ion. No change in the mechanism of the cathodic reductions has been observed. In all systems TOPO appeared to be the strongest inhibitor.