| Autor: |
Zapp, Eduardo, Souza, Franciane D., Souza, Bruno S., Nome, Faruk, Neves, Ademir, Vieira, Iolanda C. |
| Předmět: |
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| Zdroj: |
Analyst; 2013, Vol. 138 Issue 2, p509-517, 9p |
| Abstrakt: |
A bio-inspired complex, [(bpbpmp)FeIII(m-OAc)2CuII](ClO4), 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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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