Brief introduction:
National standard GB 11914-89 specification analysis method to make the water quality of the determination of chemical oxygen demand (COD) COD (cr) steps, strictly stipulated the method of heating digestion time, solution acidity, the dosage of the catalyst and oxidant conditions. It is obvious that water quality determination of COD (cr) is strict conditions of provisions, violates the conditions required for the operation, can affect the accuracy of the measurement.
HCA - 100 standard COD digestion follows the international standard (ISO) and the basic principles of the national standard (GB), to ensure the micro boiling reflux heat 2 hours of operation, the preparation of the reagent solution and addition amount and GB method, ensure reliable and accurate analysis results. Features:
1. Computer technology is adopted to improve the timing control of heating furnace, can be for 6 24 standard 250 ml conical grinding at the mouth of the bottle of reflux device for heating at the same time. Achieve the purpose of energy saving, reduce power load and improve efficiency.
Burr return line instead of 2. The glass ball return line, and to replace tap water cooling, air cooling technology can both water-saving and can make the instrument standardization, but also improved the security of the instrument to use.
3. The instrument of chemical solution preparation, operation and COD calculation completely comply with GB11914-89, less than 50 mg/L of COD water samples by dilution titrant and antioxidants, to improve the accuracy of more than 700 mg/L COD water samples, can be finished by the proportion of water dilution. Technical parameters:
Digestion sample number: 6
Dispelling the bottle capacity: 250 ml (24 # grind tapered bottle mouth)
Digestion sample weight: 20 ml
Measuring range: 10-700 mg/L (greater than 700 water samples after dilution of m0g/L) were
Digestion time: 10 minutes to 2 hours and 30 minutes (the user can adjust)
Measurement error: potassium hydrogen phthalate standard solution (500 mg/L), relative standard deviation is not more than 5.0%;
Industrial organic wastewater (500 mg/L), relative standard deviation is not more than 8.0%
Ambient temperature: 35 ℃ or less
Heating power: 1250 w (AC 220 v, 50 hz)
Instrument size: 400 mm (L) (W) * 560 mm * 300 mm (H)
Brief introduction:
National standard GB 11914-89 specification analysis method to make the water quality of the determination of chemical oxygen demand (COD) COD (cr) steps, strictly stipulated the method of heating digestion time, solution acidity, the dosage of the catalyst and oxidant conditions. It is obvious that water quality determination of COD (cr) is strict conditions of provisions, violates the conditions required for the operation, can affect the accuracy of the measurement.
HCA - 100 standard COD digestion follows the international standard (ISO) and the basic principles of the national standard (GB), to ensure the micro boiling reflux heat 2 hours of operation, the preparation of the reagent solution and addition amount and GB method, ensure reliable and accurate analysis result
