• Journal of the Korean Chemical Society
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• v.37 no.9
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• pp.820-825
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• 1993

The ion exchange capacity of HDBPDA ion exchanger, {(4,5) : (13,14)-dibenzo-6,9,12-trioxa-3,15,21-triazabicyclo[15.3.l]heneicosa-(1,17,19)(18,20,21) triene ion exchanger: HDBPDA ion exchanger} was 3.8 meq/g. The distribution coefficients of alkali and alkaline earth metal ions in water and the various concentration of hydrochloric acid were determined. Concentration of hydrochloric acid have almost not influenced on the distribution coefficients of alkali and alkaline earth metal ions, but generally, the distribution coefficient was slightly increased with decrease of concentration of hydrochloric acid. The distribution coefficients of metal ions in water are larger than those of various hydrochloric acid concentrations. Also, alkali and alkaline earth metal ions are separated by column ion exchange chromatography using HDBPDA ion exchange with water as eluent. The distribution coefficents of alkali and alkaline earth metal ions were increased with increase of ionic radii of metal ions.

• Analytical Science and Technology
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• v.6 no.5
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• pp.471-477
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• 1993

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(${\Delta}$) 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(${\alpha}$) 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.