Trace Metal and Plating Bath Analysis

The ADI 2045 VA is an on-line Process Analyser based on the principle of Voltammetric Analysis. This measurement method has been routinely applied in the laboratory for decades. With the ADI 2045 VA online Analyser, voltammetric analysis can be used directly in the process stream. With the 797 VA Computrace system of Metrohm as the heart of the analyser, the system can be used for on-line trace metal analysis in waste or surface water for example, as well as for quality control of plating baths in the Galvanic Industry. The modular concept of the analyser makes it possible to adapt it to the specific needs or chemistry of the application. Most common applications are heavy metals in waste water streams, for example in mining or semiconductor industry and heavy metals in surface water. Metals that can be determined are (amongst others): Pb, Cu, Cd, Zn, Co, Ni, Fe and Cr.

Features:

• Flexibility due to the modular concept
• Industrial PC based (IPC)
• Touch screen operation
• Multi mode electrode for (heavy) metal analysis
• CVS method allows leveller and brightener control

Voltammetry

Voltammetry is a quantitative analysis method in which the current flowing through an electrode is measured while a potential scan is superimposed on that electrode. For the measurement a 3 electrode system is used, consisting of a working electrode, a reference electrode (Ag/AgCl/KCl 3 M) and an auxiliary electrode. At the surface of the working electrode the oxidation or reduction occurs.
A plot of data gives current -voltage curves, called voltammograms, these curves provide both quantitative and qualitative information about the solution that is measured. The technique is mainly used for the determination of dissolved substances that can be oxidised or reduced relatively easy. Examples of such species are: metal ions and metalloids with the exception of the alkali and earth alkali metals, some anions like cyanide and iodide, organic compounds like acetaldehyde and vitamins.