First isocratic separation of fourteen lanthanides and yttrium by high-performance chelation ion chromatography
First isocratic separation of fourteen lanthanides and yttrium by high-performance chelation ion chromatography
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DOI：
10.1039/a607966k
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发表时间：
1997-01-01
期刊：
影响因子：
--
通讯作者：
Jones, P
中科院分区：
文献类型：
--
作者：
Nesterenko, PN;Jones, P
用键合在硅胶上的亚氨基二乙酸填充色谱柱，在硝酸钾存在下，用稀硝酸溶液作洗脱剂，等度分离14个镧系元素和钇。考察了硝酸浓度、洗脱剂离子强度和温度对测定结果的影响。结果表明，在0.5-1.0 M硝酸钾的存在下，镧系元素的保留是由相应的表面络合物与亚氨基二乙酸官能团的稳定性定义的。然而，残留离子交换活性的存在仍然是负责钇和Eu-Gd和Dy-Ho对的分离的选择性。
The possibility was demonstrated of the isocratic separation of 14 lanthanides and yttrium using a chromatographic column packed with iminodiacetic acid bonded to silica and with diluted nitric acid solutions in the presence of potassium nitrate as the eluent. The influence of concentration of nitric acid, ionic strength of the eluent and temperature was investigated. It was shown that in the presence of 0.5-1.0 M potassium nitrate the retention of the lanthanides is defined by the stability of the corresponding surface complexes with iminodiacetic acid functional groups. However, the presence of residual ion-exchange activity is still responsible for the selectivity of the separation of yttrium and Eu-Gd and Dy-Ho pairs.