Determination of Alkaline Earth Metals in Japanese Rain and Snow by ICP Emission Spectrometry

摘要

Alkaline earth metals such as magnesium, calcium, strontium and barium were easily determined in rain and snow samples by a sequential ICP emission spectrometry, when appropriate instrumental conditions and solution matrices were chosen. In this study, 1 N HNO3solution was used, without any preconcentration or separation, in a regular determination mode by a sequential ICP emission spectro-photometer. The amount of monthly deposition of magnesium, calcium, strontium and barium was determined at 11 stations in Japan in 1984 and 1985. The seasonal variation of Sr(excess) was served as a good index for the characterization of Japanese rain, evaluating the contribution rate of sea salt.