Patent ID: 9057145
Filing Date: 2015-06-16
Classification: C25D

Abstract:
1. Method for electrodepositing a metal layer from an electrolytic bath, wherein the concentrations of at least two components of the electrolytic bath are monitored, wherein the following steps are carried out: (a) a sample is taken from the electrolytic bath; (b) the sample is supplied to a column for solid phase extraction, which contains a solid sorbing agent; (c) the column is subjected to a washing procedure with a first eluent, wherein the at least two components remain on the column, and undesired components are eluted from the column; (d) the at least two components are eluted from the column by a second eluent; (e) the concentrations of the at least two components in the eluate obtained in step (d) are determined by photometry, polarography or refractometry without separating the at least two components from each other and without use of high performance liquid chromatography, wherein the monitoring of the concentration of the at least two components is carried out in combination with a dosing system, which, depending on the result of the determination of the concentrations, supplies the corresponding fresh amount of the at least two components; and wherein the sequence of steps (a) to (e) is repeated at regular intervals of one minute to 10 hours.