硫酸第2セリウムによる水中有機物の酸化について

概要

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Characteristics on oxidation of organic materials in water by ceric ion were studied for clarifying the significance of chemical oxygen demand (COD_<Ce>) wite ceric sulfate. Preliminary experiments were first carried out in relation to such oxidizing conditions as refluxing time, concentration of sulfuric acid added and contribution of catalyst, i.e., silver sulfate and chrome sulfate. Thus, practical method of COD_<Ce> determination in the present studies was established and compared with the usual methods on COD_<Cr> and COD_<Mn>, of various water samples. These studies led to the conclusion that the ceric method appeared enough comparable to the dichromate method from view point of both oxidizability and analytical precision. Since an interference of chloride ion to the ceric method was distinguished, the masking of chloride ion seemed necessary. Addition of mercuric sulfate was fairly effective to mask the interference similaly to the case of dichromate method.
山梨大学の論文