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Discussion on Method of Determining COD of Waste Water Sample with High Chlorine Ion and Low COD

Chuanfang Liu

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Abstract

Waste water sample,whose chlorine ion is higher than 2 000 mg/L and COD value is low,is added mercury sulfate as screening agent.The ratio of mercury sulfate and chlorine ion is 15∶1 and the COD value of retained chlorine ion the blank reagent is deducted.The result is accurate and reliable,which exteneds the usage range of standard method.

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What this paper is about

Waste water sample,whose chlorine ion is higher than 2 000 mg/L and COD value is low,is added mercury sulfate as screening agent.The ratio of mercury sulfate and chlorine ion is 15∶1 and the COD value of retained chlorine ion the blank reagent is deducted.The result is accurate and reliable,which exteneds the usage range of standard method.

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Available abstract

Waste water sample,whose chlorine ion is higher than 2 000 mg/L and COD value is low,is added mercury sulfate as screening agent.The ratio of mercury sulfate and chlorine ion is 15∶1 and the COD value of retained chlorine ion the blank reagent is deducted.The result is accurate and reliable,which exteneds the usage range of standard method.

Key concepts: Chlorine, Chemistry, Mercury (programming language), Reagent, Sulfate, Wastewater, Ion, Environmental chemistry

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