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The main working principle of the COD water quality tester is that after satisfying the strong oxidant and all the opportunities in the sample, the COD parameters of the sample are obtained after measuring the difference in the consumption of the strong oxidant and calculating with a specific formula. Water quality COD detection principle: The organic matter in the water sample is oxidized by potassium dichromate in the presence of sulfuric acid, silver sulfate, and mercury sulfate to generate carbon dioxide (CO2) and water (H2O).
The amount of potassium dichromate used is calculated by the difference in the volume of ammonium ferrous sulfate consumed in the sample titration. The amount of potassium dichromate used in the reaction is equal to the oxygen (O2) used to oxidize the organic matter in the wastewater.
Features of COD water quality tester:
1. Large-screen Chinese character menu, intuitive reading, convenient operation, simple to use, no training required.
2. Large-capacity memory with tens of thousands of measurement results, with historical data reading and output functions.
3, COD water quality tester uses 'Water and Wastewater Analysis Method Strategy' in line with HJ/T399-2007 verification regulations, the measurement method is authoritative, and the measurement results are legal.
4. A waterproof carrying case combination greatly satisfies the needs of emergency on-site monitoring.
5. The COD water quality tester uses a dual-wavelength high-precision optical system, which satisfies the needs of low, medium, and high ranges. With a large measuring scale and high precision, it can measure all kinds of wastewater.
6. The special quartz colorimetric tube replaces the cuvette or the colorimetric cell and completes the heating response and colorimetric measurement process in the same vessel. The whole process of digestion and colorimetry is in a closed condition, and it is resistant to chlorine interference 10000mg/L.
7. Provide three kinds of reagents: pre-packed tube, large liquid packaging, and powder packaging. No need to buy chemicals yourself. The measurement results have good consistency, no need to calibrate the instrument by yourself.
8. The COD water quality tester adopts ergonomic planning, compact and portable, easy to operate, simple measurement, accurate results, and precision exterior package circuit to ensure that the compact body has a variety of practical functions, built-in lithium battery, satisfactory laboratory And the measurement needs of various places such as the scene.
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