COD Digestion Apparatus

The SH-100 standard COD digestion instrument supplied by the standard COD digestion instrument is standardized by the national HJ828-2017 standard analysis method, which specifies the determination steps of chemical oxygen demand COD (Cr) for water quality, and strictly specifies the condition indicators such as heating digestion time, solution acidity, oxidant and catalyst dosage of the method. It is obvious that the determination of COD (Cr) in water quality has strict conditions, and any operation that violates these conditions will affect the accuracy of the determination.

The COD (Cr) constant temperature heater follows the basic principles of international standards (ISO) and national standards (GB), ensuring the digestion operation of reflux heating and micro boiling for 2 hours. The preparation and addition of reagent solution are consistent with the GB method, ensuring reliable and accurate analysis results.

The instrument adopts microcomputer technology for timed control of the heating electric furnace, which can simultaneously heat 8 (or 10) specially designed cylindrical digestion bottles. To achieve the goals of energy conservation, reducing power load, and improving efficiency.

The instrument adopts a glass burr reflux tube instead of a spherical reflux tube, and uses air cooling technology instead of tap water cooling, which can save water and standardize the instrument.

The chemical solution preparation, operation, and COD calculation of the instrument can be improved by diluting titrants and oxidants for COD water samples below 50mg/L, and by diluting the water sample ratio for COD water samples above 1000mg/L.

Technical specifications of SH-100 standard COD digestion instrument supplied by the manufacturer of the standard COD digestion instrument

1. Measurement range: 0-1000mg/L, 0-10000mg/L (diluted water sample)

2. Measurement time: no more than 2 hours

3. Measurement error: Potassium hydrogen phthalate standard solution (500mg/L), relative standard deviation not exceeding 5.0%

4. Industrial organic wastewater (500mg/L), with a relative standard deviation not exceeding 8.0%

5. Environmental temperature: 5-40 ℃

6. Heating power: about 1500W (AC 220V ± 22V, 50HZ),