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Chemical-free COD Analyzer

The on-line COD analyzer QuickCODultra by LAR Process Analysers AG determines the chemical oxygen demand (COD) in water. Using a robotic, horizontally and vertically moving injection needle, the sample is transported to the furnace.

chemical oxygen demand analyzer LAR QuickCODultra

LAR's QuickCODultra is operated via touch screen

The on-line COD analyzer QuickCODultra by LAR Process Analysers AG determines the chemical oxygen demand (COD) in water. Using a robotic, horizontally and vertically moving injection needle, the sample is transported to the furnace. Due to the robust needle samples with a high particle density will be easily injected into the furnace. Thus, operators do not need any sample preparation such as filtration, and the sample will be analyzed in its entirety. The COD analyzer works with the high temperature combustion method at 1200 °C. At this temperature, the complete oxidation of all compounds is guaranteed. Due to the high oxidation potential of the 1200 °C no oxidation-promoting catalysts or hazardous chemicals are needed. As a result, the costs of ownership are minimized. Moreover, the measurement results are free of chloride interferences. The amount of oxygen needed is detected by an oxygen detector. The determination of the chemical oxygen demand takes place in less than 2 minutes.

Using the multi-stream option LAR's QuickCODultra measures up to 6 sample streams in one unit. The COD analyzer is optimally suitable for the detection of production losses in chemical and food industries as well as for control of waste water treatment plants.

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