化学
吸附
离子交换树脂
水溶液
镁
离子交换
无机化学
双水相体系
同位素
离子
核化学
有机化学
量子力学
物理
作者
Dong Won Kim,Byung Moo Kang,Byeong Kwang Jeon,Hojin Ryu
标识
DOI:10.1006/jcis.2002.8411
摘要
Magnesium isotopes effects were investigated by chemical ion exchange using synthesized 2-aminomethyl-18-crown-6 (AM18C6) bonded Merrifield peptide resin. It was found that separation factors larger those reported previously were obtained, and the hydration and isotope mass effects are more significant than that of the complexation. The capacity of the crown ion exchanger was 2.3 meq/g dry resin. The adsorption capacity of the resin for magnesium ion was 26.8 mg/g dry resin at pH 7. The heavier isotopes of magnesium were enriched in the solution phase, while the lighter isotopes were enriched in the resin phase. The separation factors of (24)Mg-(25)Mg, (24)Mg-(26)Mg, and (25)Mg-(26)Mg were 1.0085, 1.0162, and 1.0081, respectively.
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