title: A bio-inspired sensor based on surfactant film and Pd nanoparticles.
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.
authors.affiliation: Laboratory of Biosensors, Department, of Chemistry, Federal University of Santa Catarina, 88040-900, Florianópolis, SC, Brazil.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Zapp
authors.forename: Franciane D
authors.initials: FD
authors.lastname: Souza
authors.forename: Bruno S
authors.initials: BS
authors.lastname: Souza
authors.forename: Faruk
authors.initials: F
authors.lastname: Nome
authors.forename: Ademir
authors.initials: A
authors.lastname: Neves
authors.forename: Iolanda C
authors.initials: IC
authors.lastname: Vieira
mesh_terms: D015374:Biosensing Techniques; D002396:Catechols / Q000032:analysis* / Q000737:chemistry; D004785:Environmental Pollutants / Q000032:analysis* / Q000737:chemistry; D005290:Ferric Compounds; D006873:Hydroquinones / Q000032:analysis* / Q000737:chemistry; D007854:Lead / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry; D010084:Oxidation-Reduction; D010165:Palladium / Q000737:chemistry; D019800:Phenol / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry; D013638:Tars / Q000032:analysis / Q000737:chemistry
chemical_list: D002396:Catechols; D004785:Environmental Pollutants; D005290:Ferric Compounds; D006873:Hydroquinones; D013501:Surface-Active Agents; D013638:Tars; C024746:tobacco tar; D007854:Lead; D019800:Phenol; D010165:Palladium; C034221:catechol; C031927:hydroquinone