Adsorption and isotope effects by ion exchange with 1-aza-12-crown-4 bonded Merrifield peptide resin.
Adsorption and isotope effects by ion exchange with 1-aza-12-crown-4 bonded Merrifield peptide resin.
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DOI：
10.1016/s0021-9797(03)00287-x
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发表时间：
2003-07
影响因子：
9.9
通讯作者：
D. Kim;B. Jeon;B. Kang;N. Lee;H. Ryu;Yong‐Ill Lee
中科院分区：
文献类型：
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作者：
D. Kim;B. Jeon;B. Kang;N. Lee;H. Ryu;Yong‐Ill Lee
合成了1-氮杂-12-冠-4键合的Merrifield多肽树脂，用洗脱色谱对镁同位素效应进行了研究。氮杂冠醚离子交换树脂的交换容量为0.89MEQ/g干树脂。镁的重同位素在树脂相中富集，轻同位素在溶液相中富集。水化效应小于络合效应和同位素质量效应。根据Glueckauf法从洗脱曲线和同位素分析中确定了单级分离因子。24Mg2+-25Mg2+、24Mg2+-26Mg2+和25Mg2+-26Mg2+的分离系数分别为1.012、1.023和1.011。
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 of24Mg2+–25Mg2+,24Mg2+–26Mg2+, and25Mg2+–26Mg2+were 1.012, 1.023, and 1.011, respectively.