Cyclic voltammetric method for the measurement of concentrations of subcomponents of plating solution additive mixtures

摘要

A cyclic voltammetric method for measuring concentrations of subcomponents of additive mixtures, comprising the steps of: (a) preparing a basis solution which contains all of the components of an unknown solution to be measured, except a component of interest; (b) preparing a calibration solution which contains the component of interest in a known concentration near that which would be expected in the unknown solution; (c) adding measured amounts of the calibration solution to a first defined volume of the basis solution and plotting a first cathodic charge against the added volume of the calibration standard; (d) adding measured amounts of the unknown solution to a second volume of the basis solution and plotting a second cathodic charge against the added volume of the unknown solution; and (e) comparing the slopes of the first and second curves to determine the concentration of the component of interest in the unknown solution.