Controlled potential coulometric analysis of palladium alloy

Abstract

A method is described for the analysis of palladium alloy by controlled potential coulometry. Silver was determined coulometrically at the potential of -0.15V (vs. SCE) in the electrolyte of 0.1M NH₄Cl-1M NH₄OH. A mixed solution of Au, Pt and Pd was electrolysed at -0.18-0.19 V in 0.1M NH₄Cl-1M NH₄OH, and at +0.55 V and 0.00V in 0.1M Na₂HPO₄-0.5M H₃PO₄, that correspond to the electrolysis of Au+Pt, Au and Au+Pt +Pd respectively. From the quantities of electricity for these electrolysis, the percent ages of these elements composing palladium alloy were caluculated.