アルカリ性還元気化 : 原子吸光法による有機物共存試料の水銀簡易定量

概要

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The simple method by cold-vapor atomic absorption spectrophotometry was studied for the samples co-existing organic substances by the rapid determination of mercury using alkaline tin (II) reduction. It is known that in the presence of tin (II) organomercury compounds such as methyl-, ethylmercury chloride and phenylmercury nitrate are reduced to inorganic mercury (II) in alkaline with a certain amount of copper (II) ion. But the reduction of organomercury compounds cannot proceed in the presence of potassium zinc cyanide as a masking agent for silver ion which is effective for the complicated environmental samples. However, the present paper shows that the addition of a large amount of copper (II) ion resolved this complicated problem. The reason for the remarkable effect of copper (II) ion was on the reduction of organomercuy compounds was therefore discussed. These aspects gave a simple method without time-consuming pre-treatment step in the samples which contained several organic substances. This method was applied for the determination of mercury in wastewater or biological samples with satisfactory results. The detection limit and precision of this method were 0.2 μg/l and 3%, respectively.
公益社団法人日本薬学会の論文
1988-10-31