Reversed-phase high-performance liquid chromatography of iron(II) and copper(II) chelates with 4,7-diphenyl-1,10-phenanthroline disulfonate

X. Mudasir, Meiko Arai, Naoki Yoshioka, Hidenari Inoue

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10 Citations (Scopus)


The chromatographic behaviour of negatively-charged iron(II) and copper(II) chelates with 4,7-diphenyl-1,10-phenanthroline (bathophenanthroline) disulfonate (BPS) on a reversed-phase Inertsil ODS-2 column was studied by using methanol-water (60:40, v/v) containing 0.02 M tetramethylammonium bromide (TMAB) and 0.025 M tris(hydroxymethyl)aminomethane (Tris)-HCl at pH 7.5 as a mobile phase. The possibility that the hydrophilic Tris-HCl buffer also serves as a counter ion together with TMAB was briefly discussed. Chromatographic parameters influencing the separation of the chelates were optimized. The method was successfully applied to indirectly determine iron(II) and iron(III) contents in natural water. Nickel(II) ion and possibly organic pollutants interfere with the present method.

Original languageEnglish
Pages (from-to)171-176
Number of pages6
JournalJournal of Chromatography A
Issue number1-2
Publication statusPublished - 1998 Mar 13



  • 4,7-Diphenyl-1,10-phenanthroline disulfonate
  • Copper
  • Iron
  • Metal chelates

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Organic Chemistry

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