黒色メンブランフィルターへの不均一な沈殿捕集による硫酸イオンの簡易目視定量

概要

論文の詳細を見る
The measurement of sulfate ion is important in environmental and industrial fields. However, a field-analytical method which can be implemented in field testing and performed the site is still lacking. Therefore, the development of a sensitive, yet simple technique is need ed for the field determination of sulfate ion. In this study, a simple visual method has been established for the determination of sulfate ion at PPm levels using a black membrane filter Our method consists of two steps : barium chloride is added to a water sample to form barium sulfate, and the mixture containing the white precipitate is filtrated through a black membrar filter using a 10 ml syringe. We found that the precipitate is effectively concentrated in a distinct pattern on the membrane filter, which is a tracing of the reverse side of the support screen. Sulfate ion as low as 2 ppm concentrations can be visually detected when a 10 ml sample is used. The method reported here will be useful as a simple and rapid field test, which has long been great demand.
社団法人日本分析化学会の論文
2003-09-05