A method for determining the concentration of an additive X of an electrochemical
bath that includes at least one further component Y is set forth. In accordance
with the method, a predetermined amount of a starting solution is provided. The
starting solution comprises virgin makeup solution that is saturated with the further
additive, or forms a mixed solution that is saturated with the further additive
when combined with an amount of the electrochemical bath for measurement that is
extracted for measurement. A predetermined amount of the extracted electrochemical
bath is then added to the predetermined amount of the starting solution to form
the mixed solution. At least one electroanalytical measurement cycle it is then
executed using the mixed solution and the results of the measurement cycle are
compared with a known measurement standard.
