Portable pH- / redox meter
Prominent
The Redox potential is an unspecific sum parameter that does not permit selective determination of a defined oxidant or reducing agent at simultaneous presence of further redox active reagents. Moreover, the measuring signal is strongly pH dependent and takes a saturation curve with increasing concentration. However, the Redox measurement can be used as a cost-efficient alternative to selective direct determination of oxidants and reducing agents (e.g. via amperometric probes) or as a redundant measuring additionally to selective direct determination. For this purpose, the following conditions must be observed:
- The connection to be analyzed is potential determinating and there are no further redox active connections
- The pH value of the process fluid remains constant
- The concentration to be expected is located in the steep section of the saturation curve
Application areas
- Cyanid detoxication at high pH value by oxidation
- Chromate detoxication at low pH value by reduction
- Monitoring of disinfection effect when dosing oxidants
- etc.
