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Low-voltage thin-layer electrophoresis of inorganic anions on silica gel-G and titanium (IV) tungstate layers: separation of coexisting F − , Cl − , Br − and I − , I − , IO 3 − and IO 4 − , Fe(CN) 6 4− and Fe(CN) 6 3−
JPC - Journal of Planar Chromatography - Modern TLC ( IF 1.1 ) Pub Date : 2020-02-14 , DOI: 10.1007/s00764-019-00007-x
Surendra Dutt Sharma , Charu Sharma

The electrophoretic behavior of twenty anions has been studied on silica gel-G, titanium (IV) tungstate and silica gel-G- titanium (IV) tungstate admixture layers using 0.1 M solutions of oxalic acid, citric acid, tartaric acid, succinic acid and acetic acid as background electrolyte. The mechanism of migration is explained in terms of adsorption and the solubility of various sodium or potassium salts of the anions in water. Titanium (IV) tungstate behaves only as an adsorbent and not as an ion exchanger. Being a cation exchanger, there is no exchange phenomenon occurring with anions. The migration of halides increase linearly with an increase in the bare ion radii of these ions. Differential migration of the anions on silica gel-G layers led to binary, ternary and quaternary separations of similar anions such as F – Cl – Br – I, I – IO3 – IO4, BrO3 – IO3 and Fe(CN)63− – Fe(CN)64−. The two cyanoferrate ions are separated from industrial waste water and from fixer and bleach solutions. The migration of anions has also been found to be in accordance with their lyotropic numbers.

中文翻译:

硅胶-G和钨酸钛(IV)层上无机阴离子的低压薄层电泳:分离共存的F-,Cl-,Br-和I-,I-,IO 3-和IO 4-,Fe (CN)6 4−和Fe(CN)6 3−

使用0.1 M的草酸,柠檬酸,酒石酸,丁二酸和四氢呋喃溶液对20种阴离子在硅胶-G,钨酸钛(IV)和硅胶-G-钛(IV)钨酸盐混合物层上的电泳行为进行了研究。乙酸作为背景电解质。根据阴离子的各种钠盐或钾盐在水中的吸附和溶解度来解释迁移机理。钨酸钛(IV)仅充当吸附剂,而不充当离子交换剂。作为阳离子交换剂,不会与阴离子发生交换现象。卤化物的迁移随着这些离子的裸离子半径的增加而线性增加。在硅胶上-G层中的阴离子的差分迁移导致的二元,三元和类似的阴离子的季分离如F --氯- -溴- - I -,我- - IO 3 - - IO 4 -,的BrO 3 - - IO 3 -和Fe(CN)6 3- -铁(CN)6 4-。从工业废水,固色剂和漂白剂溶液中分离出两种氰铁酸根离子。还发现阴离子的迁移与它们的溶致数一致。
更新日期:2020-02-14
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