<報文>緑青成分分析による大気汚染解析

概要

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Originally the verdigris on the copper structure was made up of basic copper carbonate. However, it become to contain of sulfate or chloride through the air pollution. Therefore, the influence of air pollution could be evaluated by means of analyzing the verdigris composition. Recent year, ion chromatography was remarkably developed to make possible for micro analysis of sulfate, chlorine and nitrate ions. The author considered that, in order to protect the cultural properties from the pollution, the analyzing of their verdigris would be very useful. On this idea, authors collected and analyzed a few mg of verdigris on roof, water pipe, bronze status and so on. As a result of this survey, it was found that （1） the samples remaining carbonate of some extent located in the non-polluted area, （2） the occurrence of sulfate and chloride were comparable with each other, （3） the predominance of sulfate corresponded to the industrial area, （4）chloride would be based to influence from the road or sea salt.