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Featured researches published by Tsuneo Shimizu.


Analytica Chimica Acta | 1963

Colour reaction of scandium with quercetin and its application to the analysis of scandium

Hiroshi Hamaguchi; Rokuro Kuroda; Ryuitiro Sugisita; Naoki Onuma; Tsuneo Shimizu

Abstract A spectrophotometric study of the scandium-quercetin complex is described; μg amounts of scandium can be determined with quercetin at 43.5 mμ and pH 4.4. A 1:1 complex is formed. The apparent instability constant of the complex was estimated as 2.7·10 -7 by a spectrophotometric method. An ion-exchange method for separating scandium from several interfering ions is described.


Analytical Chemistry | 1964

Separation of Scandium from Yttrium, Rare Earths, Thorium, Zirconium, Uranium, and Other Elements by Anion Exchange Chromatography in Ammonium Sulfate Media.

Hiroshi Hamaguchi; Atsuhiro. Ohuchi; Tsuneo Shimizu; Naoki Onuma; Rokuro Kuroda


Geochimica et Cosmochimica Acta | 1962

Values for trace elements in G-1 and W-1 with neutron activation analysis—II. Mo, Sn, Ta, W

Hiroshi Hamaguchi; Rokuro Kuroda; Tsuneo Shimizu; Iwao Tsukahara; Ryuichi Yamamoto


Bunseki Kagaku | 1995

Advances in chromatography of the rare earth elements. (Review).

Koichi Oguma; Tsuneo Shimizu; Rokuro Kuroda


Bunseki Kagaku | 1968

SEPARATION OF SCANDIUM BY ANIONIC LIQUID--LIQUID EXTRACTION FROM SULFURIC ACID--AMMONIUM SULFATE MEDIUM USING A HIGH MOLECULAR WEIGHT AMINE.

Tsuneo Shimizu


Journal of the Atomic Energy Society of Japan / Atomic Energy Society of Japan | 1961

Neutron Activation Analysis of Molybdenum, Tin, Tantalum and Tungsten in Silicates

Hiroshi Hamaguchi; Rokuro Kuroda; Tsuneo Shimizu; Ryuichiro Sugisita; Iwao Tsukahara; Ryuichi Yamamoto


Bunseki Kagaku | 1966

Spectrophotometric determination of tungsten with tiron

Tsuneo Shimizu; Kimiko Kato; Sakuko Oyama; Kyoichi Hosohara


Bunseki Kagaku | 1967

SPECTROPHOTOMETRIC DETERMINATION OF SCANDIUM WITH NAPHTHYL AZOXINE S.

Tsuneo Shimizu


Bunseki Kagaku | 1964

Simultaneous spectrophotometric determination of tantalum and niobium with tiron

Tsuneo Shimizu; Kyoichi Hosohara


Journal of the Atomic Energy Society of Japan / Atomic Energy Society of Japan | 1963

THERMAL NEUTRON ACTIVATION ANALYSIS OF TANTALUM IN SEA WATER

Hiroshi Hamaguchi; Rokuro Kuroda; Kyoichi Hosohara; Tsuneo Shimizu

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Naoki Onuma

University of Education

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