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化学学报
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化学学报 ›› 1964, Vol. 30 ›› Issue (1): 21-24. 上一篇    下一篇

论文

12杂多酸銨盐的离子交換性貭Ⅰ.碱金属离子的纸上层析

沈石年1, 章竹君1, 程恢文2   

  1. 1. 西北大学化学系;
    2. 中国科学院西北化学研究所
  • 投稿日期:1962-11-19 发布日期:2013-06-03

ION EXCHANGE PROPERTIES OF AMMONIUM SALTS OF 12 HETEROPOLYACIDS Ⅰ. CHROMATOGRAPHIC SEPARATIONS OF THE ALKALI METALS

SHEN SHIH-NIEN1, ZHANG ZHU-JUN1, CHENG HUEI-VEN2   

  1. 1. Department of Chemistry, Northwestern University;
    2. Northwestern Institute of Chemistry, Academia Sinica
  • Received:1962-11-19 Published:2013-06-03

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被引次数

1

将磷钼酸銨固着于滤紙上作为交换剂,以硝酸銨和硝酸的乙醇水溶液为展开剂进行下行展开,鋰、鈉、鉀、铷、銫可以一次分离.斑点頗为集中.实驗时室温为25℃,展开时间为六小时.展开剂浓度在硝酸铵为0.6M,硝酸浓度为0.1M,乙醇与水的比例在1:1到5:1之间时,分离均完全.例如乙醇:水=2:1时的比移值分别为Li,0.84;Na,0.75;K,0.53;Rb,0.14;Cs,0.00.

The chromatographic separations of the alkali metals by means of filter papers impregnated with ammonium molybdophosphate have been investigated.Using alcoholic aqueous solutions of ammonium nitrate and nitric acid as mobile phases,it has been succeeded in separating the alkali metals from each other by the descending technique in a single step.The spots were distinct and compact.The temperature was kept at 25℃ and it took six hours for the development.For various ratios of ethanol to water(1:1 to 5:1),complete separation were obtained when the concentrations of ammonium nitrate and nitric acid were kept at 0.6 M and 0.1 M respectively.The Rf values were Li,0.84; Na,0.75;K,0.53;Rb,0.14; and Cs,0.00 when ethanol to water was in the ratio of 2 to 1.