CODCr-1LType COD analyzer

Instrument Overview

It is a single parameter measuring instrument developed based on the domestic water quality situation and regulatory requirements, which conforms to the HJ/T399-2007 standard and can meet the daily measurement requirements of the laboratory, in line with the usage habits of domestic users. The determination of COD is carried out using the closed catalytic digestion colorimetric method with a digestion tube, which is recognized by the US EPA. The sample values are directly displayed after being processed by imported cold light sources, narrowband interference technology, and microcomputer automatic data processing. The instrument is widely used in environmental monitoring, sewage treatment, scientific research institutions, and colleges and universities.

detectionprinciple

Using a closed digestion tube for closed digestion, a specialized oxidant containing a certain amount of potassium dichromate is used in a strong acidic solution. Under the action of a catalyst, the solution is dissolved at a constant temperature of 165 ℃ to oxidize the reducing substances in the water. The absorbance of Cr6+and Cr3+in the water sample is measured at different wavelengths, and the COD content in the water is calculated based on the absorbance.

TECHNICAL INDEX

1. Testing standard HJ/T399-2007 "Determination of Chemical Oxygen Demand in Water Quality - Rapid Digestion spectrophotometric method"

2. Measurement range 5-2000mg/L (segmented measurement)

3. No effect on chloride ion concentration below 1000mg/L, resistant to chloride interference

4. Detection limit: 5mg/L

5. Dissolve in an environment of 165 ℃ for 15 minutes

6. Determination accuracy COD>50mg/L,< 5％； COD＜50mg/L,＜10％

7. Measurement time 20-30 minutes

8. Batch processing capacity 6/16 water samples

9. Repeatability<5%

10. Optical stability 0.001A/20 minutes (100000 hours lifespan)

11. Color comparison method: Color tube comparison

12. Power supply mode AC (220V 10%), 50Hz

13. Host size 200mm * 150mm * 90mm

14. Environmental temperature 5-40 ℃

15. Environmental humidity of 85% without condensation

16. The weight of the host is less than 1.5kg, and the weight of the digester is 5.5kg

Instrument characteristics

1. LCD screen interface design, fully Chinese operation, direct data reading, simple operation.

2. Imported cold light source, no preheating required, energy-saving, environmentally friendly, fast response, with a lifespan of up to 100000 hours and strong optical stability.

3. Built in standard curve, no need for user calibration and calibration.

4. Enable guided measurement with one click operation, simple and fast

5. Adopting a digestion colorimetric integrated method, reducing manual operation, making the measurement simple, fast, and safe.

6. Customize more than 40 curves and store 200 complete detection data.

7. Intelligent PID temperature control technology and dual anti overheating protection system ensure safe, uniform, and fast heating.

8. Standard 16 hole intelligent digestion instrument, which can achieve one click digestion without setting.

9. Custom mode, temperature (room temperature -200 ℃) can be set arbitrarily.

10. It has power-off protection function to prevent data loss.

11. One click factory reset to prevent loss or accidental deletion of standard curves.

12. The equipment is not damaged by human factors, with a three-year warranty and lifetime free software upgrades.

Configuration List

1 host, 1 digestion instrument, 1 digestion protective cover, 1 digestion colorimetric tube, 1 test tube rack, 1 set of reagents(Powder or pre made reagents are optional)Two power cords, one color tube cleaning cloth, and one instruction manual/certificate/warranty card.