Analyzer for online-determination of TOC in aqueous media using thermic catalytic combustion
- Industrial wastewater monitoring
- Control of process wastewater
- Monitoring of industrial surface water
- Monitoring of surface water at airports
- Municipal wastewater monitoring
- Recording of the carbon load to control the nutrient dosage
- Optimized for industrial applications with varying pH values and high salt loads
- Fast and easy maintenance thanks to good accessibility of all components
- Available measuring ranges inside of 0.25 mg/l to 12,000 mg/l TOC expandable by predilution
- pH-controlled acid dosage for TIC stripping minimizes acid consumption
- Measurement proceeds as "Double Batch"
- One and two-channel measurement available
- Heatable salt trap significantly increases the service life
- Exchangeable furnace concept significantly decreases service time thanks to prepared furnace
- External triggered self testing with TOC standard (e.g. for limit violation)
The analyzer determines the TOC (total organic carbon) content of an aqueous sample. It uses thermic
catalytic combustion with subsequent NDIR (non-dispersive infrared) detection of the produced CO 2 .
TOC indicates the total organic load of water. It is used to assess the water quality and can serve as a
basis for calculation of wastewater charges.
The analyzer works with two interconnected circuits, a liquid and a gas circuit, to determine TOC by the
direct method. In the liquid circuit, the sample is pumped into the analyzer where it can be diluted in
case of high salt loads or TOC values. The sample is acidified and the inorganic carbon is eliminated
(Stripping). Then the sample is transferred through a rotation slit filter in which the particles are
separated according to DIN standards. After that, it is dosed into the furnace.
The sample is combusted at a temperature of 850 °C (1550 °F). Then, the combustion gas is cooled
down and the CO 2 content is determined by the NDIR detector.
The double-batch operation makes sure that the reactor and gas circuit are flushed with CO 2 -free
carrier gas and the basic trace is determined while the next sample is prepared in the liquid circuit.