AppliTek Introduces Mercury-Free Wet-Chemical Method for Determination of COD
Nazareth, Belgium –AppliTek has adapted its series of on-line (automatic) COD analyzers with a wet-chemical method that avoids the use of mercury sulphate. Conventional chemical oxygen demand or COD analyses are based on standard laboratory methods that generate waste streams containing significant amounts of mercury, which is used to avoid interference of high chloride levels in samples.Although the use of mercury sulphate was synonymous with reliable COD analysis, users perceived it as an additional hassle due to the costs and efforts to treat the toxic waste streams. By adapting the wet-chemical method, AppliTek not only offers an analytical mainframe with a reduced environmental footprint, but also a significant reduction in total cost of ownership by avoiding purchase and transport of mercury reagents.The determination of Chemical Oxygen Demand is widely used to measure the level of organic contamination found in wastewater and surface waters. This water quality indicator is determined by measuring the equivalent level of oxygen required to oxidize all the organic matter in the sample, often performed in off-line laboratory methods.Contrary to many commercially available on-line analyzers or sensors that translate organic matter into COD equivalent parameters, the AppliCODŒ¬ Series of On-line COD Analyzers are the answer for those customers who require äóìtrueäó COD values to quantify the organic pollution of waste waters, effluents and surface water. The AppliCODŒ¬ Series are available in different configurations, including the type of wet-chemical oxidation either by potassium dichromate or by potassium permanganate.