QIWEI QW-COD-T desktop COD rapid measuring instrument, including 50 pcs of preform liquid
QW-COD-T
QiWei QW-COD-T Desktop COD rapid measuring instrumentSPEC
QiWei QW-COD-T Desktop COD rapid measuring instrumentDetails
QiWei QW-COD-T Desktop COD rapid measuring instrumentPacking list
- SKU
- NB020969
- Determination method
- Rapid catalytic method (chromium method)
- Measurement range
- 0~150Mg/L low range 100~1000mg/L high range (> 1000mg/L diluted determination);
- measurement error
- 5~ 100 mg/L, absolute error ≤ +/- 5 mg/L; 100 mg/L~ 1000 mg/L, relative error ≤ +/- 5
- Digestion environment
- 165 +/- 1 ℃; digestion time: 15 minutes;
- Measurement time
- Measure 9, 12 or 25 water samples simultaneously in 30 minutes; (the number of water samples varies according to different configurations)
- An indication of temperature error
- ＜± 1℃
- Uniformity of temperature field
- ≤ 2℃
- An indication of time error
- ≤ ± 2%
- record storage
- 20 measurement results can be stored
- Environmental temperature
- （5~40）℃
- Working Relative Humidity
- Relative Humidity < 85% (non-condensing)
- Power Supply
- AC220V±10% / 50Hz
Introduction
Chemical Oxygen Demand (COD) is abbreviated as COD. It is the oxidation dose consumed when a certain strong oxidant is used to treat a water sample under certain conditions. It is an indicator of the amount of reducing substances in the water. The reducing substances in the water are various organic matter, nitrite, sulfide, ferrous salt, etc., but the main thing is organic matter. For this reason, chemical oxygen demand (COD) is often used as a measure of the amount of organic matter in the water. The higher the chemical oxygen demand, the more serious the pollution of the water body by organic matter.
This instrument uses a special reagent that contains a composite catalyst that both accelerates the reaction and has an anti-interference effect on chloride ions. The water sample and a special reagent undergo a rapid redox reaction in a digester, and after the reaction, trivalent chromium ions are generated, and their concentration is determined by spectrophotometry to obtain the corresponding COD value.
The COD rapid Tester has been greatly improved in terms of stability, accuracy, measurement range and practicability. It can be adapted to the various needs of different users, and can be used in chemical, petroleum, coking, papermaking, metallurgy, brewing, and other industrial wastewater and various domestic (CN) sewage monitoring applications. It can be widely used in the detection of wastewater in various industries (industrial wastewater, municipal sewage, domestic (CN) sewage and surface water in rivers and lakes).
