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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

Separation Characteristics of Alkali and Alkaline Earth Metal Ions Using Novel HDBPDA Ion Exchanger

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1993, v.6 no.5, pp.471-477
Kim, Dong Won
Kim, Chang Suk
Choi, Ki Young
Jeon, Young Shin
Hong, Choon Pyo
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Abstract

The novel macrocylic ligand {(4, 5):(13, 14)-dibenzo-6, 9, 12-trioxa-3, 15, 21, -triazabicyclo [15. 3. 1]heneicosa-(1, 17, 19)(18, 20, 21) triene: HDBPDA} was synthesized, and protonable constants of the ligand and the complex stability constants with alkali metals alkaline earth metals were determined. We evaluated the resolution factor(<TEX>${\Delta}$</TEX>) from equation that inducing from stability constants(pK). Also, this ligand was grafted on chloromethylated styrene-divinyl benzene(Merrifield resin) for HDBPDA, ion exchanger. Alkali and alkaline earth metal ions were separated using water by the column chromatography with this ion exchanger. Selectivity(<TEX>${\alpha}$</TEX>) and resolution(Rs) of alkali and alkaline earth metal ions were measured from the elution curves chromatogram. The selectivity and resolution values of the various ions calculated from the elution curves were compared with those abtained from pK values. The results were in a good agreement between tow methods. Ion exchange capacity of the resin were determined using the alkali and alkaline earth metal ions and pH dependence of capacity was also discussed.

keywords
HDBPDA Ion Exchanger, Capacity, Alkali and Alkaline Earth Metals, Ion Exchange Chromatography, Stability Constant, Protonation Constant


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