title: Peroxynitrite Sensor Based on a Screen Printed Carbon Electrode Modified with a Poly(2,6-dihydroxynaphthalene) Film.
abstract: For the first time the electropolymerization of 2,6-dihydroxynaphthalene (2,6-DHN) on a screen printed carbon electrode (SPCE) was investigated and evaluated for peroxynitrite (PON) detection. Cyclic voltammetry was used to electrodeposit the poly(2,6-DHN) on the carbon electrode surface. The surface morphology and structure of poly(2,6-DHN) film were investigated by SEM and FTIR analysis, and the electrochemical features by cyclic voltammetry. The poly(2,6-DHN)/SPCE sensor showed excellent electrocatalytic activity for PON oxidation in alkaline solutions at very low potentials (0-100 mV vs. Ag/AgCl pseudoreference). An amperometric FIA (flow injection analysis) system based on the developed sensor was optimized for PON measurements and a linear concentration range from 2 to 300 μM PON, with a LOD of 0.2 μM, was achieved. The optimized sensor inserted in the FIA system exhibited good sensitivity (4.12 nA·μM-1), selectivity, stability and intra-/inter-electrode reproducibility for PON determination.
authors.affiliation: National Institute for Research & Development in Chemistry and Petrochemistry-ICECHIM, Biotechnology Department, 202 Spl. Independentei, Sector 6, Bucharest, Romania. ioanasilvia.hosu@ed.univ-lille1.fr.
authors.forename: Ioana Silvia
authors.initials: IS
authors.lastname: Hosu
authors.affiliation: National Institute for Research & Development in Chemistry and Petrochemistry-ICECHIM, Biotechnology Department, 202 Spl. Independentei, Sector 6, Bucharest, Romania. diana.constantinescu@icechim-rezultate.ro.
authors.forename: Diana
authors.initials: D
authors.lastname: Constantinescu-Aruxandei
authors.affiliation: National Institute for Research & Development in Chemistry and Petrochemistry-ICECHIM, Biotechnology Department, 202 Spl. Independentei, Sector 6, Bucharest, Romania. jecu.luiza@icechim.ro.
authors.forename: Maria-Luiza
authors.initials: ML
authors.lastname: Jecu
authors.affiliation: National Institute for Research & Development in Chemistry and Petrochemistry-ICECHIM, Biotechnology Department, 202 Spl. Independentei, Sector 6, Bucharest, Romania. dir.stiintific@icechim.ro.
authors.forename: Florin
authors.initials: F
authors.lastname: Oancea
authors.affiliation: National Institute for Research & Development in Chemistry and Petrochemistry-ICECHIM, Biotechnology Department, 202 Spl. Independentei, Sector 6, Bucharest, Romania. mihaela.badea@icechim.ro.
authors.forename: Mihaela
authors.initials: M
authors.lastname: Badea Doni
keywords: 2,6-dihydroxynaphthalene; amperometry; cyclic voltammetry; electrocatalysis; electropolymerization; flow injection analysis; peroxynitrite; screen printed carbon electrode