Product Description:

The instrument is suitable for the determination of chemical oxygen demand in water quality. The dichromate method is used to add a known amount of potassium dichromate solution to the water sample, and silver salt is used as a catalyst in a strong acid medium. After boiling and refluxing, ferrous sulfate is used as an indicator to titrate the unreduced dichromate value in the water sample with ferrous ammonium sulfate. The amount of ferrous ammonium sulfate consumed is converted into the mass concentration of oxygen consumed. The instrument has the advantages of high efficiency and high accuracy.

Applicable standards:GB/T 11914

Technical parameters:

1. Measurement range:0～1000mg/L, 0～10000mg/L(Dilution of water sample)
2. Measurement time ≤2h
3. Measurement error:a.Potassium hydrogen phthalate standard solution（500mg/L）The relative standard deviation is not greater than5%

b.Industrial organic wastewater（500mg/L）The relative standard deviation is not greater than8%

Performance characteristics:

1Adhere to standards（ISO）In accordance with national standards（GB）The basic principle ensures reflux heating with slight boiling2The digestion operation for hours, the preparation and addition of reagent solutions are all in accordance with national standards（GB）*To ensure the reliability and accuracy of the analysis results.

2Using microcomputer technology to timed control the heating of infrared electric furnaces, it can simultaneously5(10)Simultaneously perform infrared heating on a conical flask reflux device. To achieve the goals of safety, energy conservation, reducing power load, and improving efficiency.

3Using glass burr reflux tubes instead of spherical reflux tubes and air cooling technology instead of water cooling methods not only saves water but also standardizes the instrument.

4Below50mg/LofCODThe accuracy of water samples can be improved by diluting titrants and oxidants, which is higher than1000mg/LofCODWater samples can be measured by diluting them proportionally.