Online TOC for the rough stuff

LAR's online TOC measurement system QuickTOCultra reliably determines organic contamination in most difficult waters.



The LAR online TOC measurement system QuickTOCultra reliably determines organic contamination in most difficult waters. The innovative process control does not require any sample dilution and goes without catalysts and filtration. The raw sewage sample, including particles, is directly injected into the reactor via the injection system. By using the patented oxidation method at 1,200°C, all organic substances are fully oxidised. Subsequently, the CO2 content is detected. At this temperature, salts are melted, blown out of the reactor and collected in a unique construction. The measurement system is equipped with a special high salt option for a sodium chloride content (NaCl) of up to 30%. Thus, clogging, broken reactors and long downtimes are matters of the past.

The QuickTOCultra convinces with a quick response time and stands out due to its very low maintenance and operating costs, as well as a high availability of more than 98%. The weekly servicing is limited to few minutes. The software is intuitive and can be controlled via touchscreen. Offering the option of measuring 6 streams, this custom-tailored measurement system is ideally suited for the surveillance and optimization of industrial processes. Moreover, it is equally well suited for its application in industrial and communal waste water treatment plants.

Press contact

Benjamin Mattejiet
Manager Marketing Communication

+49 30 27 89 58-59


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The total organic carbon (TOC) is one of the most important sum parameters in the assessment of the organic pollution of water. Since it includes all carbon compounds as one mass, it is exactly defined and an absolute quantity. Therefore, it may be determined directly.

Read more about TOC measurement methods.

Total organic carbon analyzers of LAR Process Analysers AG

The chemical oxygen demand (COD) indicates the amount of oxygen which is needed for the oxidation of all organic substances in water and is thus an important indicator for water analysis. It is considered in the planning and controlling of treatment, as well as assessing its efficiency, thus forming the basis for the calculation of waste water charges.

The COD can be determined in laboratory or online, whereby these methods significantly differ in duration and consumables used.

Read more about COD measurement methods.

COD analyzers of LAR Process Analysers AG

The biochemical oxygen demand (BOD) indicates the amount of oxygen which is needed for the biological degradation of organic substances in water.

Since the generally used BOD5 excludes the nitrification part of the process, this parameter is poorly suited for the control of waste water treatment plants. Alternatively, the total BOD is well-suited, due to the determination of the nitrogen as well as the carbonaceous part of biological degradation.

Read more about the online measurement of BOD.

Toxicity is described as the direct harmful effect of a substance on organisms. These effects can already occur at low concentraions of toxic substances and are dependent on the incubation period and the dosage.

Some test methods that are available on the market can detect toxicity by using fish, daphnia, molluscs, algae or luminous bacteria and testing whether a water sample has a toxic effect on the organisms. They do not, however, identify exactly which toxins are present.

Read more about online toxicity measurements.

BOD / toxicity analyzers of LAR Process Analysers AG

The total nitrogen bound (TNb) shows the pollution of water caused by nitrogen compounds. Nitrogen may be present as ammonia, ammonium salts, nitrites, nitrates and organic nitrogen compounds.

In contrast to single measurements of the above-mentioned components, the TNb determination contains all these substances in a single analysis process.

Read more about online TNb measurements.

The total phosphorus (TP) is a sum parameter that shows the organic and inorganic phosphorus compounds in water. Phosphorus is an essential nutrient for humans as well as flora and fauna. However, the substance – depending on its concentration– may cause serious damage.

Read more about online TP measurements.

TN TP analyzer of LAR Process Analysers AG