Establishment of heterodinuclear replacement complexation and its application to direct determination of iron in natural water with dibromo-o-nitrophenylfluorone

Hong Wen Gao, Teng Zeng, Lu Ting Pan, Ling Chen, Ming Li Li, Yuan Yuan

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

The chromophore dibromo-o-nitrophenylfluorone (DBNPF) was used to complex Fe(III) and Cu(II) at pH 5.88. Fe(III) can competitively replace Cu(II) from its dinuclear complex Cu(DBNPF)Cu, and forms the Cu(DBNPF)Fe heterodinuclear complex. The Fe-DBNPF and Cu-DBNPF complexes were also characterized by the spectral correction technique. The heterodinuclear replacement complexation (HRC) is proposed and first used for the quantitative detection of iron in trace level with high sensitivity and good selectivity by the light-absorption ratio variation approach. The limit of detection of Fe is 1.0 μg L-1. The method has been successfully applied to the direct determination of Fe(II, III) dissolved and bound to suspended substances in natural water.

Original languageEnglish (US)
Pages (from-to)335-344
Number of pages10
JournalMicrochimica Acta
Volume158
Issue number3-4
DOIs
StatePublished - May 1 2007
Externally publishedYes

Keywords

  • Determination of Fe
  • Dibromo-o-nitrophenylfluorone
  • Heterodinuclear replacement complexation
  • Light-absorption ratio variation approach

ASJC Scopus subject areas

  • Analytical Chemistry

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