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See Chinese contents: HJ 828-2017 HJ 828-2017: Water quality -- Determination of the chemical oxygen demand -- Dichromate method
This Standard specifies the dichromate method for determining chemical oxygen demand in water. This Standard applies to the determination of chemical oxygen demand in surface water, domestic sewage and industrial wastewater. This Standard does not apply to the determination of chemical oxygen demand in water, of which the chloride concentration is greater than 1000 mg/L (after dilution).
