<報文>環境大気中の水銀の分析とその挙動

概要

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The apparatus system was designcd for the determination of total mercury in the atmosphere. Parameters influencing the efficacy of this system, i. e. the effect of coexisting substances, the effect of a catalyst for oxidative decomposition, the effect of combustion furnace for interference eiimination, collectoin capability of collectors, collection time and weather conditions were investigated. Organic compounds coexisted were decomposed by heating at 570℃ and sulfur and halogen compounds were removed by absorbing in sodium carbonate granule and silver wire. Mercury vapor was amalgamated on gold wire wool (25μ in diameter) 1g. Mercury absorbed in collectors was released by heating and determined by the flameless atomic absorption spectrometry. This method was applied to the determination of total mercury in ambient atmosphere. Consequently, we have found that gold collector yielded very good results and the preponderance of volatile mercury forms in ambient atmosphere was almost elemental mercury, because the furnace for combustion was disused. The value as a geochemical background in ambient atmosphere for Japan was estimated 10 ng/㎥ from mercury contents in various areas.
横浜国立大学の論文