- Detailed Introduction
The COD-60A oxygen consumption/permanganate index rapid analyzer adopts acidic (alkaline) potassium permanganate titration method and a heating/titration integrated measurement system. Through unique control methods, the digestion and titration determination processes have been fully automated. Easy to operate, convenient and fast. This instrument can be widely used for rapid determination of oxygen consumption/permanganate index in drinking water, surface water, groundwater, seawater, industrial water and other fields. Its characteristics are:
The titration method is reliable and the data is accurateAdopting the most accurate coulometric titration method currently available. Sensitive response and accurate data.
Rapid titration:The digestion time can be adjusted within the range of 10 to 800 seconds. Measurement data can be obtained in 5-10 minutes.
Multi range, directly read COD value:By setting the range according to the dilution ratio, the COD value of undiluted raw liquid can be directly read without conversion.
Easy to operate:Integration of measurement units, combined with oxidation and titration processing steps. After setting up the instrument, only one click operation is needed to automatically complete the entire process from automatic zero calibration, oxidation, titration to data printing.
Can be converted into standard method measurement values:The coefficients can be calibrated and adjusted using standard methods. Pre determine the correlation between the laboratory standard analysis method and COD-60A, and input the linear regression equation to obtain the conversion value of the standard analysis method.
Automatic standard program control to reduce operational errors:Unique system control, automatic oxidation state (heating/cooling) and titration steps, precise temperature control, based on Coulomb titration method, using self-cleaning electrodes for titration. Reduced human error among operators.
Diverse maintenance/inspection functions:Adopting electrode cleaning mode and self checking titration mode, easy maintenance and inspection work can be carried out.
Data storage function (100 sets), built-in printer and clock: The measurement results can be printed after the measurement is completed, and historical data can be displayed or printed later.
Comparison with national standard methods
| GB 11892-89 | COD-60A |
| Take 100mL (water sample+dilution water) in a conical flask | Take 5mL (water sample+dilution water) in a reagent bottle |
| Add 5mL of sulfuric acid and 10mL of potassium permanganate solution to the burette | Add 15mL of sulfuric acid and 2mL and 0.5mL of standard reagents 1 and 2 respectively |
| Place the conical flask in a boiling water bath | Put the reagent bottle into the measuring instrument and start automatic heating |
| Dissolve in a boiling water bath at 100 ℃ or equivalent heating device for 30 minutes | Heating and digestion at 100 ℃ (adjustable from 10s to 800s) |
| Add 10mL of sodium oxalate solution to the burette | |
| Maintain liquid temperature (60-80 ℃) | Automatically control the temperature to 65 ℃ |
| Volumetric titration of artificial potassium permanganate solution | Automatic Coulombic Titration |
| Record the volume of potassium permanganate solution after 30 seconds of color development | Determination of oxidation-reduction potential and determination of titration endpoint |
| Blank test calibration | Automatically calculate and obtain results |
| Calculate manually according to the formula to obtain the result | Can display the converted measurement values of manual measurement method |
Whole machine order number: COD60A-2-6
Standard accessories
| name | Item number | quantity |
| Measuring instruments, support rods, and locators | 0KK00001 | 1 |
| Electrode sheath | 0IB00011 | 1 |
| Measurement electrode 1 | 0LA00001 | 1 |
| Measure electrode 2 | 0LA00002 | 1 |
| cell | 0DA00002 | 2 |
| Measurement pool seat | 0LZ00003 | 1 |
| stirrer | 0SE00001 | 1 |
| Reagent 1 (100ml) | 143C143 | 1 |
| Reagent 2 (25ml) | 143C144 | 1 |
| Electrode filling solution (25ml) | 143C145 | 1 |
| Micro pipette (0.5ml) | 0SZ00013 | 1 |
| Measuring pipette (5ml) | 0SZ00014 | 1 |
| Pipette (2ml) | 0SZ00015 | 1 |
| Fill liquid and refill with a suction tube | 0SZ00016 | 1 |
| User Manual | 0PA00064 | 1 |
