期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 263, 期 2, 页码 528-532出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/S0021-9797(03)00287-X
关键词
1-aza-12-crown-4; distribution coefficient; magnesium isotope; separation factor; isotope effect
Magnesium isotope effects were investigated by chemical ion exchange with synthesized 1-aza-12-crown-4 bonded Merrifield peptide resin using elution chromatography. The capacity of azacrown ion exchanger was 0.89 meq/g dry resin. The heavier isotopes of magnesium were enriched in the resin phase, while the lighter isotopes were enriched in the solution phase. The hydration effect is less than the complexation and isotope mass effects. The single stage separation factor was determined according to the method of Glueckauf from the elution curve and isotopic assays. The separation factors of Mg-24(2+)-Mg-25(2+), Mg-24(2+)-Mg-26(2+), and Mg-25(2+)-Mg-26(2+) were 1.012, 1.023, and 1.011, respectively. (C) 2003 Elsevier Inc. All rights reserved.
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