Online CODcr COD Water Quality Analyzer Potassium Dichromate Oxidation Spectrophotometric Method Monitor

Online CODcr COD Water Quality Analyzer Potassium Dichromate Oxidation Spectrophotometric Method Monitor

>>Overview

Chemical Oxygen Demand (COD) refers to the mass concentration of oxygen consumed by strong oxidants under specific conditions to oxidize organic and inorganic reducing substances in water samples. COD is a critical indicator reflecting the extent of water pollution caused by organic and inorganic reducing substances.

This analyzer is designed for long-term, unattended, automatic, and continuous operation based on field configurations. It is widely applicable to scenarios such as industrial pollution source wastewater discharge, industrial process wastewater, industrial wastewater treatment plant effluent, and municipal sewage treatment plant effluent. Depending on the complexity of on-site testing conditions, optional preprocessing systems can be integrated to ensure reliable testing processes, accurate results, and full compliance with diverse on-site requirements.

>>Features‌‌
A mixture of the water sample, potassium dichromate digestion solution, silver sulfate solution (added as a catalyst to enhance oxidation efficiency for straight-chain aliphatic compounds), and concentrated sulfuric acid is heated to 165°C. After the dichromate ions oxidize organic substances in the solution, a color change occurs. The analyzer detects this colorimetric change, converts it into a COD value output. The amount of dichromate ions consumed corresponds to the quantity of oxidizable organic matter, which is quantified as the COD value.

>>Technical Parameter