Rapid Quantitative Methods for the Determination of Brighteners, Levellers and Anti-Pitting Agents in Nickel Electroplating Baths

SYNOPSIS

The rapid determination of addition agents in bright nickel plating baths has been achieved experimentally. Metal-ion additions can often be determined rapidly and accurately enough from the bath by direct polarography; the determination of cadmium is given as an example. Organic brighteners such as p-toluenesulphonamide and wetting agents such as sulphonated isopropylnaphthalene can be determined from their influence on the polarographic maximum of oxygen. If both are present the maximum bubble-pressure method for surface tension can be used to determine the wetting agent separately.