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What is the colorimetric integrated tube of COD water quality analyzer?

by:BOQU     2022-01-23

COD water quality analyzer is a name relative to the traditional reflux method COD analyzer. On the basis of the traditional reflux method standard, the digestion temperature is increased from 150 °C to 165 °C, and the digestion time is reduced from 2 hours to 10 minutes, the time to obtain a set of COD data has been reduced from 2-4 hours to half an hour now, which greatly saves the measurement time.

COD water quality analyzer has obtained the national measuring instrument form approval certificate, the South China National Metrology Institute test report, the computer software copyright, and has passed the ISO9001:2008 quality management system certification, etc. The company is a high-tech enterprise, a member of the environmental monitoring industry association, etc.

COD water quality analyzer is designed and developed according to HJ/T399-2007 'Determination of Water Chemical Oxygen Demand Rapid Digestion Spectrophotometry' standard, the test results are accurate and effective, and the instrument can be tested and certified by any third-party certification agency.

The solution containers used in spectrophotometry are 'cuvettes' and 'cuvettes'. The cuvette spectrophotometry is to first digest the water sample with a digestion tube, and then transfer the solution to the cuvette to measure the absorbance; the colorimetric tube spectrophotometry is to use a digestion tube for colorimetry and then transfer the solution. In the colorimetric tube for absorbance measurement; the digestion and colorimetric integrated tube is a combination of 'digestion tube' and 'colorimetric tube'. In the process of COD determination, one tube is used for digestion and colorimetry to complete all steps without changing the tube. Some operation steps are omitted, the influence of human error is reduced, and the safety of operators is ensured (the COD measurement solution contains concentrated sulfuric acid, potassium dichromate, and other chemicals, which are vulnerable to the potential danger of strong acid and high toxicity during the liquid transfer process. ).

Accuracy is the top priority for any testing instrument. Have you ignored the core issue and are still choosing the appearance, weight, and size of the instrument? According to the national standard, the COD rapid tester uses different wavelengths for detection in different ranges. When the COD content is in the range of 15-150mg/L, one wavelength is used for measurement, and when the COD content is in the range of 100-1000mg/L, another wavelength is used.

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