HZXJ-9012 typeStandard COD Microcrystalline Air Cooled Digestion InstrumentUsing glass burr reflux pipes instead of spherical reflux pipes, and replacing tap water cooling with air cooling technology. The cooling part is mainly completed by a burr condenser tube and a fan. The upper part of the condenser tube is spherical, and the catalyst is added from here to prevent the instantaneous evaporation of light components in the sample. The lower part is "burr" shaped, with three opposing spherical condenser tubes extending from the condenser tube wall on a plane. In addition, the dual effect of cooling water and fan in the upper spherical reflux tube ensures the reflux cooling of the sample.

HZXJ-9012 typeStandard COD Microcrystalline Air Cooled Digestion InstrumentMain features:

This COD digestion instrument has been developed in accordance with the national environmental protection department's standard analysis method to standardize the chemical oxygen demand (COD) of water quality_（Cr）The measurement steps strictly specify the conditions and indicators of the method, such as heating and digestion time, solution acidity, oxidant and catalyst dosage. It is obvious that the water quality COD_（Cr）There are strict conditions for the measurement, and any operation that violates these conditions will affect the accuracy of the measurement.

It follows the basic principles of international standards (ISO) and national standards (GB), ensuring a digestion operation with reflux heating and micro boiling for 2 hours. The preparation and addition of reagent solutions are consistent with the dichromate method of the Ministry of Environmental Protection (HJ828-2017), ensuring reliable and accurate analysis results.

HZXJ-9012 typeTechnical specifications:

Measurement range: 0-1000mg/L (diluted with water sample)

Measurement time: no more than 2 hours

Measurement error: Potassium hydrogen phthalate standard solution (500mg/L), relative standard deviation not exceeding 5.0%; Industrial organic wastewater (500mg/L), with a relative standard deviation not exceeding 8.0%

Environmental temperature: Room temperature~40 ℃

Power supply voltage: 220V 50HZ

Heating power: 2000W (AC 220V ± 22V, 50HZ)

Sample quantity: 8 (using a 250ml conical flask with a 24 # grinding mouth)