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Volume 13 (2002)
- Issue 3 Pages 68-
- Issue 2 Pages 40-
- Issue 1 Pages 2-
Volume 13, Issue 2
Displaying 1-3 of 3 articles from this issue
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Ibrahim. M. ISMAIL, MD. Abdul MATIN, Masao NOMURA, Shahinur BEGUM, Mas ...2002 Volume 13 Issue 2 Pages 40-45
Published: May 25, 2002
Released on J-STAGE: March 18, 2010
JOURNAL FREE ACCESSThe isotope effects of copper in ligand exchange processes were studied by means of chelating ion exchange resin system and EDTA complex/cation-exchange resin system. Two cases of different ionic interactions systems were investigated using chelating ion exchange resin system; Cu-H and Cu-Co systems. Both cases were investigated using the breakthrough technique, while the reverse breakthrough technique was applied in the case of EDTA. The chromatograms obtained from two different chelating resin systems were not ideal but they can be improved in future work. The heavier isotope 65Cu was found to be enriched in the ligand side in all cases, the resin phase in the case of chelating resin and the solution phase in the case of EDTA complex system. The separation coefficients in the two chelating systems were found to be constant and equal to 1.1×10-5. Concerning the EDTA complex system, the chromatogram obtained was ideal one and the separation coefficient was found to be 1.3×10-5.View full abstractDownload PDF (899K) -
Yasutoshi BAN, Masao AIDA, Masao NOMURA, Yasuhiko FUJII2002 Volume 13 Issue 2 Pages 46-52
Published: May 25, 2002
Released on J-STAGE: October 28, 2010
JOURNAL FREE ACCESSZinc isotope effects in Zn-EDTA ligand exchange were studied by using a macroporous strongly acidic cation exchange resin packed in columns. Both front and rear boundaries of a zinc band were sharp after 28m migration at 60°C. Zinc isotope ratios of 66Zn/64Zn were measured by a mass spectrometer with surface ionization source. The enrichment of the heavier isotope, 66Zn, was found at the front band boundary region. Isotope separation coefficient per unit mass, ε/ΔM, and height equivalent to a theoretical plate were calculated as 8.0×10-5 and 0.9mm, respectively. Discussion is extended to the profile analysis on the chromatographic isotope separation. The results were compared with previously reported isotope effects in the ligand exchange reaction of other elements.View full abstractDownload PDF (859K) -
Nobuhiro MATSUSHITA, Junya WATANABE2002 Volume 13 Issue 2 Pages 53-59
Published: May 25, 2002
Released on J-STAGE: March 18, 2010
JOURNAL FREE ACCESSWe introduce the basic operational methods of ion exchange resins and those fundamental functions. We explain the kind of ion exchange groups and polymer structures. For actual use, we summarized pre-conditioning methods of ion exchange resins. And we also explained measuring methods of those several properties.View full abstractDownload PDF (2179K)
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