Metrohm's 797 VA Computrace can determine the relationship between the labile (or free copper) and total copper.
It is a modern voltammetric measuring instrument that connects to a PC directly via a USB connection.
The intuitive Windows XP-based PC software controls the measurement, records the measuring data and allows full evaluation of the recorded information.
The sample and auxiliary solutions are added to the reaction vessel and the labile copper is determined on a mercury film formed at the surface of the ultra-trace electrode.
By performing the analysis first using an ultra-trace electrode, then separately using a classic mercury electrode, it is possible to measure first the values of labile and then total copper to determine the ratio of the different species.
Whether the labile or total copper is being determined, the process can be partially or fully automated through the use of Metrohm Dosino dispensing devices and autosamplers.
The low running costs are an additional bonus point for voltammetry, requiring no expensive combustible gases or reconstruction of the laboratory infrastructure to accommodate specialist ducting and fume hoods.
Apart from the small amounts of reagents required for the analysis, only small volumes of pure nitrogen are required.
