Ion-exchange thin-layer chromatography of metal lons in organic solvent — Hydrochloric acid — Complexing agent media

Kuroda, Rokurô; Hosoi, Naohito

doi:10.1007/bf02259236

Cited by 6 publications

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“…The CIESE concept is based on simultaneous ion-exchange (IX) and liquid−liquid extraction by a bifunctional separation mechanism which occurs in applying CIESE-active organic compounds such as, ethers, ketones, and some others in the presence of mineral acids to selectively elute ions from IX resins. Since then, many CIESE systems involving both cation and anion exchangers have been studied. − However, all of them can be eventually characterized by the same extraction mechanism which involves protonation of a CIESE-active component of Lewis base type resulting in the formation of an oxonium salt followed by an interaction of the later with extractable ion from the resin phase due to the formation of ion association complexes in the mobile phase . At the same time, application of CIESE-based separation processes in water-imiscible organic solvents is not known, although the CIESE systems of this type are of practical importance.…”

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confidence: 99%

Aqua-Impregnated Resins. 2. Separation of Polyvalent Metal Ions on Iminodiacetic and Polyacrylic Resins Using Bis(2-ethylhexyl) Phosphoric and Bis(2-ethylhexyl) Dithiophosphoric Acids as Organic Eluents

1999

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This paper dedicated to the further development of the novel aqua-impregnated-resin (AIR) technique reports the results obtained by studying the column separation of equimolar mixtures of Cu(2+), Al(3+), and Zn(2+) on iminodiacetic (IDA) and polyacrylic (PAR) resins by using 0.2 M heptane solutions of either bis(2-ethylhexyl) phosphoric acid (DEHPA) or bis(2-ethyhexyl) dithiophosphoric acid (DEHDTPA) as selective eluents for extractive desorption of metal ions from the resin phase. The quantitative separation of Cu(2+)-Al(3+) mixtures has been achieved by sequential elution of metals from PAR with DEHDTPA and H(2)SO(4) solutions. Purification of Cu(2+) from Al(3+) and/or Zn(2+) and Al(3+) from Cu(2+) and Zn(2+) is achieved by extractive elution of metal mixtures from IDAR or PAR with DEHPA or DEHDTPA solutions, respectively, followed by stripping of the purified metals with 1.1 M H(2)SO(4). The resulting purity of metals obtained with the yield of >96% exceed 95%.

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