CODcr Analyzer
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Principle:Potassium dichromate oxidation, spectrophotometricRange:10~500/50~2000/100~5000mg/LDetection limit :10mg/LResolution :0.01mg/LPermissible error:>100mg/L, 10%FS; <100mg/L, 5mg/L;Repeatability:>100mg/L, 10%FS; <100mg/L, 5mg/L;
Heating a mixture of water sample, potassium dichromate digestion solution, silver sulfate solution (silver sulfate as a catalyst can more effectively oxidize linear fatty compounds), and concentrated sulfuric acid to 175 ℃ will cause a color change after the oxidation of organic matter in the solution by dichromate ions. The analyzer detects this color change and converts it into COD value output. The amount of dichromate ions consumed is equivalent to the amount of oxidizable organic matter.
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Principle:Potassium permanganate oxidation, spectrophotometricRange :0~10mg/L or 10~20 mg/LDetection limit :0.1mg/LResolution :0.01mg/LPermissible error:10%FSRepeatability :5%FSPotassium permanganate solution and sulfuric acid solution are added to the sample, mixed and digested. Potassium permanganate oxidizes the organic pollutants in the sample and the color of the water sample changes. The monitor detects this color change and converts it into a permanganate index value and outputs it.
