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Measuring principle
The tested water sample undergoes pretreatment, and the water sample, potassium dichromate, and sulfuric acid silver sulfate mixed solution (silver sulfate as a catalyst can more effectively oxidize linear fatty compounds) are digested at high temperature to convert hexavalent chromium into green trivalent chromium. The degree of color change is proportional to the content of reducing substances in the water sample. The analyzer detects this color change and converts it into CODcr value output.
Technical parameter
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