JQ-100X standard COD digester (6 tubes)

JQ-100X standard COD digester (6 tubes)

Product Overview:

The national standard HJ828-2017 replaces GB11914-89 to standardize the determination steps of chemical oxygen demand COD (cr) in water quality, and strictly specifies the conditions and 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 standard COD (CR) analyzer follows the basic principles of ISO and HJ828-2017 standards, ensuring the digestion operation of reflux heating and micro boiling for 2 hours. The preparation and addition of reagent solution are consistent with HJ method, ensuring reliable and accurate analysis results.This instrument adopts microcomputer technology for timed control of heating electric furnace, which can simultaneously heat 6 250ml triangular conical bottles with No. 24 grinding mouth reflux device. 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 not only save water and standardize the instrument, but also improve the safety of instrument use.Standard COD digesterSuitable for the determination of COD in surface water, domestic sewage, and industrial wastewater. Not applicable for the determination of COD in water with chloride concentration greater than 1000mg/L (diluted). When the sampling volume is 10.0mL, the detection limit is 4mg/L and the lower limit of determination is 16mg/L. The upper limit for undiluted water samples is set at 700mg/L. If it exceeds this limit, it must be diluted and measured.

Technical specifications:

Measurement range:10-700mg/L (measured after dilution of water samples greater than 700mg/L)

Measurement time: no more than 2 hours

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

Environmental temperature: 5-40 ℃

Heating power: 1200W (AC 220V ± 22V, 50HZ)

Main features:

By using microcomputer technology for timed control of the heating electric furnace, it is possible to simultaneously heat 5, 6, 8, or 10 250mL conical flask reflux devices with 24 standard grinding ports. To achieve the goals of energy conservation, reducing power load, and improving efficiency.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. The instrument can save thousands of yuan in water and electricity costs per year by taking samples for 2 hours per day.