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Help CenterBenchtop Rapid COD Measuring Instrument
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An overview of the
Chemical Oxygen Demand (COD). Is the oxidation dose consumed when a certain strong oxidant is used to treat water samples under certain conditions. It's an indicator of how much reductive material there is in water. The reducing material in the water has all kinds of organic matter, nitrite, sulfide, ferrite, etc., but the main is organic matter. Therefore, chemical oxygen demand (COD) is often used as a measure of the amount of organic material content in water index. The larger the COD is, the more serious the pollution of organic matter is.
This instrument adopts a special reagent, which contains a compound catalyst, which not only accelerates the reaction, but also has an anti-interference effect on chloride ions. Rapid REDOX reaction is carried out between water sample and special reagent in the digestion apparatus. Trivalent chromium ion is produced after the reaction, and its concentration is determined by spectrophotometry to obtain the corresponding COD value.
The COD rapid measuring instrument, no matter from the stability, accuracy, or measurement range, practicability has been greatly improved. It can be used in chemical industry, petroleum, coking, papermaking, metallurgy, brewing, medicine and other industrial wastewater and a variety of domestic sewage monitoring applications. It can be widely used in various industries (industrial wastewater, urban sewage, domestic sewage and river and lake basin surface water) wastewater detection.
Technical parameters:
1. Determination method: rapid catalytic method (chromium method);
2. Measurement range: low range 0~150mg/L
High range 100~1000mg/L (> 1000mg/L dilution determination);
3. Measurement error: 5-100 mg/L, absolute error ≤±5 mg/L; 100 mg/L~1000 mg/L, relative error ≤± 5%
4. Digestion temperature: 165 ± 1℃; Digestion time: 15 minutes;
5. Determination time: 30 minutes to determine 9, 12 or 25 water samples at the same time; (Quantity of water sample varies according to different configuration)
6. Temperature indicating error
7. Uniformity of temperature field ≤ 2℃;
8. Digestion time value error ≤ ± 2%;
9. Record storage: 20 measurement results can be stored.
Performance indicators:
1. Ambient temperature :(5 ~ 40) ℃;
2. Ambient humidity: relative humidity
3. Working power supply: AC220V± 10%/ 50Hz;
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