Highly selective determination of trace amounts of copper(II), nickel(II) and vanadium(V) ions with tetradentate schiff-base ligands by reversed-phase high-performance liquid chromatography and spectrophotometric detection

Makoto Kanbayashi, Hitoshi Hoshino, Takao Yotsuyanagi

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

The highly selective determination of trace amounts of metal ions by reversed-phase high-performance liquid chromatography (HPLC) and spectrophotometric detection has been accomplished without the addition of a chromogenic reagent to the eluent. Six tetradentate Schiff-base ligands, all N,N′-o-phenylenebis(salicylaldimine) (PBS) derivatives, were synthesized and made to react with the metal ions. These reagents have a high selectivity towards Co2+, Cu2+, Ni2+ and V5+ ions among eleven metal ions (these plus Al3+, Cr3+, Fe3+, Ga3+, Mn2+, Mo6+ and Zn2+). By chromatographing the derivatized metals in the HPLC system, highly sensitive and selective spectrophotometric methods for trace amounts of Cu2+, Ni2+ and V5+ have been established. For example, 4,4′-di-N,N-diethyl-PBS was suitable for the determination of trace amounts of V5+. In this system, the V5+ ion can be determined selectively at the ppb level without any preliminary concentration and separation. The detection limit of the V5+ ion was 6 · 10-9 mol/l (0.3 ppb) at a signal-to-noise ratio of 2.

Original languageEnglish
Pages (from-to)191-197
Number of pages7
JournalJournal of Chromatography A
Volume386
Issue numberC
DOIs
Publication statusPublished - 1987

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Organic Chemistry

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