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Chemical Oxygen Demand (COD) measures the amount of oxygen required to oxidize organic and inorganic substances in a water sample. It is widely used to assess water quality, monitor pollution levels, and evaluate the effectiveness of wastewater treatment processes. The COD analysis provides a reliable indicator of the contamination level in industrial effluents, rivers, lakes, and oceans, playing an important role in environmental monitoring and compliance with regulatory standards. VELP Instruments for COD Analysis VELP offers a complete range of instruments designed to simplify and optimize laboratory COD analysis. The aqueous sample, placed inside the special heating block, is subjected to the presence of acid and heat, a strongly oxidizing environment that will degrade organic and inorganic matter. Our ECO Thermoreactors and DK/DKL Digestion units ensure precise heating and digestion with settable temperature and multiple positions to operate on different samples simultaneously. VELP’s instruments guarantee reliability, ease of use, and compliance with international standards such as ISO and EPA methods.