CODcr Semi-continuos flow method and device for COD determination using coil-reactor under low temperature and high pressure

摘要

The present invention relates to an analysis device and a method for analyzing chemical oxygen demand (COD _Cr ) using potassium dichromate (K ₂ Cr ₂ O ₇ ) as an oxidizing agent, and in particular, a coiled tube 12 surrounding a heating wire 11. The coil reactor 10 is provided to increase the specific surface area of the sample (surface area that can react per unit sample), and to install the shutoff valves 31 and 32 before and after the analysis device, so that the internal pressure of the coil reactor 10 is increased. By increasing, it is possible to quickly analyze a small amount of samples while maintaining a high oxidation rate at a low reaction temperature.