How much does the COD digester cost

1、 Product Introduction

JC-103C typetallChlorine standard COD digesterFor high range measurement, a known amount of potassium dichromate solution and mercury sulfate solution are added to the water sample, and silver sulfate is used as a catalyst in a strong acid medium. After boiling and refluxing for 2 hours, 1,10-phenanthroline is used as an indicator**Ferrous ironAmmonium titration titrates unreduced potassium dichromate in water samples, consumed bySulfur ferrousThe amount of ammonium is converted to the mass concentration of oxygen consumed, which is the apparent COD.

Export the chlorine gas formed by the oxidized portion of chloride ions that have not been complexed in the water sample, absorb it with sodium hydroxide solution, and then add itIodination*Adjust the pH to about 3-2 with sulfuric acid and use starch as an indicatorThiosulfur**Standard titration solution titration, consumedSodium thiosulfateThe amount is converted into the mass concentration of oxygen consumption, which is the chloride ion correction value. The difference between the apparent COD and the chloride ion correction value is the true COD of the measured water sample.

2、 Product parameters (page price is 5 holes)

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

2. Flow range: 5-40ml/min

3. Temperature range: Room temperature -399 ℃

4. Time setting: 0-999 minutes can be set arbitrarily

5. Dissolving volume: 250ml

6. Measurement time: no more than 2 hours

7. Measurement error:

Potassium hydrogen phthalate standard solution (500mg/L)Relative standard deviation not exceeding 5.0%

Industrial organic wastewater (500mg/L)Relative standard deviation not exceeding 8.0%

8. Environmental temperature: 5-40 ℃

9. Heating power: 1300W (AC220V ± 22V, 50HZ)

★ Warm reminder: This method is suitable for the determination of chemical oxygen demand (COD) in high chloride wastewater with chloride ion content less than 20000mg/L. The detection limit of the method is 30mg/L.

3、 Product Features

1. The results of nitrogen treatment on high chlorine samples were better than those without nitrogen treatment, which meets the industry standard HJ/T70-2001.

2. By using microcomputer technology for timed control of the heating electric furnace, 5 digestion reflux devices can be heated simultaneously.

3. The use of glass burr reflux pipes instead of spherical reflux pipes, and the use of air cooling technology instead of tap water cooling, can not only save water and standardize the instrument, but also improve the safety of instrument use.

4. No need to pour into other bottles, the triangular beaker can be measured after heating, making it convenient to use.

5. The purpose is to save energy, reduce power load, and improve efficiency.