Retention of some ethylenediamine oligomers in reversed-phase chromatography

György Bánhegyi, T. Cserháti, Klára Valkó

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The retention behaviour of four ethylenediamine oligomers containing two, three, four and five monomer units was studied in reversed-phase thin-layer chromatography using various alcohols, salts, acetic acid and ammonia as eluent additives. It was established that with salt-free eluents the oligomers showed very high retention. The retention decreased with increasing salt concentration in the eluent. This phenomenon may be due to the dissociation-suppressing effect of the salts and/or to the competition for the free silanol groups on the silica surface uncovered by the impregnating agent. The salts with higher activity coefficients had a greater effect on the retention whereas lower dielectric constants of the alcohols decreased their influence on the retention. The results suggest that to obtain the minimum retention of ethylenediamine oligomers (and probably other polyamines), the use of a salt with a high activity coefficient and organic mobile phases with high dielectric constants can be recommended.

Original languageEnglish
Pages (from-to)407-414
Number of pages8
JournalJournal of Chromatography A
Volume553
Issue numberC
DOIs
Publication statusPublished - Aug 16 1991

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ethylenediamine
Reverse-Phase Chromatography
Chromatography
Oligomers
Salts
Activity coefficients
Permittivity
Alcohols
Thin layer chromatography
Polyamines
Thin Layer Chromatography
Ammonia
Silicon Dioxide
Acetic Acid
Monomers

ASJC Scopus subject areas

  • Analytical Chemistry
  • Clinical Biochemistry
  • Molecular Medicine

Cite this

Retention of some ethylenediamine oligomers in reversed-phase chromatography. / Bánhegyi, György; Cserháti, T.; Valkó, Klára.

In: Journal of Chromatography A, Vol. 553, No. C, 16.08.1991, p. 407-414.

Research output: Contribution to journalArticle

Bánhegyi, György ; Cserháti, T. ; Valkó, Klára. / Retention of some ethylenediamine oligomers in reversed-phase chromatography. In: Journal of Chromatography A. 1991 ; Vol. 553, No. C. pp. 407-414.
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