Metrohm^® 797 CVS Computrace for plating bath analysis

The newly introduced Cyclic Voltammetric Stripping technique allows the Metrohm 797 Computrace to analyze for organic additives easily and accurately.

Cyclic Voltammetric Stripping (CVS) and Cyclic Pulse Voltammetric Stripping (CPVS) are methods widely used in the plating industry for the determination of organic additives in plating solutions. These methods are indispensable to the production control of many technical coating processes, especially in the production of printed circuit boards. The quantitative determination of the additives is done indirectly using the additives’ influence on the deposition of the main component of the plating solution. Since determination uses an electrode reaction corresponding to the production process, the activity of the additives and their effectiveness in the plating process is measured directly. A simple, robust system like the 797 Computrace with an excellent platinum Rotating Disk Electrode can make easy work of the CVS analysis.

The CVS determination of organic additives can be carried out manually, partly automated, or fully automated using the Metrohm 838 Advanced Sample Processor. Series of up to 56 samples can be analyzed automatically.

Main applications:

• Acid copper baths
• Tin-lead baths
• Tin baths

Special calibration techniques are required for the quantification of the different types of additives. Brighteners are determined by means of the Linear Approximation Technique (LAT) or the Modified Linear Approximation Technique (MLAT). For suppressors, the Dilution Titration (DT) is used.

Preinstalled methods for leading bath suppliers can be loaded and started after adaption of a few parameters.