Patent ID: RE38931

Claim:
A method for measuring a target constituent of an electroplating solution using a plating and/or stripping electroanalytical technique, the electroplating solution including one or more constituents that form a byproduct that skews an initial plating and/or stripping response to an energy input of the electroanalytical technique for a first time period beyond which such skewing is negligible, the method comprising the steps of: initiating a plating and/or stripping electroanalytical measurement cycle for measurement of the target constituent by providing electrical energy to at least a pair of electrodes disposed in the electroplating solution, the electrical energy input to the pair of electrodes being provided to either plate or strip a metal to or from at least one of the electrodes for at least a predetermined time period that extends beyond the first time period; taking an electroanalytical measurement of the energy output of the electroanalytical technique after the first time period has elapsed and before the predetermined time period has elapsed; using the electroanalytical measurement to determine an amount of the target constituent in the electroplating solution so as to reduce the effect of the skewing of the initial plating and/or stripping response caused by the one or more by-products in calculating the amount of the target constituent.