Determination of metal ion concentrations by SERS using 2,2’-bipyridyl complexes

Julie Docherty, Samuel Mabbott, W. Ewen Smith, John Reglinski, Karen Faulds, Christine Davidson, Duncan Graham

Research output: Contribution to journalArticle

7 Citations (Scopus)
115 Downloads (Pure)

Abstract

Surface enhanced Raman scattering (SERS) can generate characteristic spectral “fingerprints” from metal complexes, thus providing the potential for the development of methods of analysis for the identification and quantitation of a range of metal ions in solution. The advantages include sensitivity and the use of one ligand for several metals without the need for a specific chromophore. Aqueous solutions of Fe(II), Ni(II), Zn(II), Cu(II), Cr(III) and Cd(II) in the presence of excess 2,2′-bipyridyl (bipy) were analysed using SERS. Specific marker bands enabled the identification of each metal ion and the limit of detection for each metal ion was estimated. Two of the ions, Zn(II) and Cu(II), could be detected below the World Health Organisation's (WHO) recommended limits for drinking water at levels of 0.22 and 0.6 mg L−1, respectively.
Original languageEnglish
Pages (from-to)6538-6543
Number of pages6
JournalAnalyst
Volume140
Issue number19
Early online date21 Aug 2015
DOIs
Publication statusPublished - 7 Oct 2015

Keywords

  • surface enhanced Raman scattering
  • metal complexes
  • metal ion solutions

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