草津白根山火口湖"湯釜"における全硫黄化学種濃度の定量とポリチオン酸イオン溶存量の推定

概要

論文の詳細を見る
We compared two analytical values for sulfur species in water samples of Yugama, a crater lake of the Kusatsu-Shirane volcano, collected between 1966 and 1995. One analytical method was ion chromatograph, by which concentrations of the sulfate ion (SO_4^<2->) were determined. The other was gravimetric analysis preceded by oxidation of the samples, by which total concentrations of sulfur species (T-SO_4^<2->) were determined. The concentration differences between the two were in good accordance with the total concentration of poly-thionates reported by Takano and Watanuki (1990) through the whole period studied. This suggested that the concentration difference between SO_4^<2-> and T-SO_4^<2-> can be used to estimate the concentrations of dissolved poly-thionates. In this way we can grasp very easily the secular change of the total concentration of poly-thionates without any special analytical conditions and/or instruments.
特定非営利活動法人日本火山学会の論文
2006-04-28