In-situ analyses of chemical state and ionic distribution in the extraction chromatography column

抽出クロマトカラム内におけるイオンの化学形態及び分布のその場観察

渡部 創  ; 佐野 雄一   ; 明珍 宗孝; 岡本 芳浩  ; 塩飽 秀啓   ; 池田 篤史  ; 鈴木 伸一; 矢板 毅

Watanabe, So; Sano, Yuichi; Myochin, Munetaka; Okamoto, Yoshihiro; Shiwaku, Hideaki; Ikeda, Atsushi; Suzuki, Shinichi; Yaita, Tsuyoshi

Y-K edge X-ray absorption measurements on the extraction chromatography column revealed that distribution of Y ion and local structure around Y ion inside the column can be evaluated simultaneously. The ionic distribution and the local structure were derived from the X-ray absorption intensity and EXAFS analysis, respectively. Density profile of Y ion inside the packed column moved to downstream of the column and local structural parameters of the nearest O around Y changed by supplying eluent. The X-ray absorption spectroscopy of more than one element in the column is expected to reveal the separation mechanism of the extraction chromatography.