A bio-inspired sensor based on surfactant film and Pd nanoparticles

Analyst. 2013 Jan 21;138(2):509-17. doi: 10.1039/c2an36264c.

Abstract

A bio-inspired complex, [(bpbpmp)Fe(III)(m-OAc)(2)Cu(II)](ClO(4)), was combined with a zwitterionic surfactant (ImS3-14) stabilizing pre-formed palladium nanoparticles and coated on a glassy carbon electrode (GCE). This bio-inspired surfactant film was capable of catalyzing redox reactions of dihydroxybenzenes, thus allowing the simultaneous electrochemical quantification of CC and HQ in cigarette residue samples by square-wave voltammetry (SWV). The best experimental conditions were obtained using phosphate buffer solution (0.1 mol L(-1), pH 7.0), with 1.3 nmol of the bio-inspired complex, 0.15 μmol of the surfactant and 1.08 nmol of Pd. The best voltammetric parameters were: frequency 100 Hz, pulse amplitude 40 mV and step potential 8 mV. The limits of detection calculated from simultaneous curves were found to be 2.2 × 10(-7) and 2.1 × 10(-7) mol L(-1) for HQ and CC respectively.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biosensing Techniques*
  • Catechols / analysis*
  • Catechols / chemistry
  • Environmental Pollutants / analysis*
  • Environmental Pollutants / chemistry
  • Ferric Compounds
  • Hydroquinones / analysis*
  • Hydroquinones / chemistry
  • Lead / chemistry
  • Metal Nanoparticles / chemistry
  • Oxidation-Reduction
  • Palladium / chemistry
  • Phenol / chemistry*
  • Surface-Active Agents / chemistry
  • Tars / analysis
  • Tars / chemistry

Substances

  • Catechols
  • Environmental Pollutants
  • Ferric Compounds
  • Hydroquinones
  • Surface-Active Agents
  • Tars
  • tobacco tar
  • Lead
  • Phenol
  • Palladium
  • catechol
  • hydroquinone