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Sensors 2016, 16(11), 1975; doi:10.3390/s16111975

Peroxynitrite Sensor Based on a Screen Printed Carbon Electrode Modified with a Poly(2,6-dihydroxynaphthalene) Film

National Institute for Research & Development in Chemistry and Petrochemistry—ICECHIM, Biotechnology Department, 202 Spl. Independentei, Sector 6, Bucharest, Romania
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Author to whom correspondence should be addressed.
Academic Editor: W. Rudolf Seitz
Received: 24 October 2016 / Revised: 18 November 2016 / Accepted: 19 November 2016 / Published: 23 November 2016
(This article belongs to the Section Chemical Sensors)
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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. View Full-Text
Keywords: 2,6-dihydroxynaphthalene; electropolymerization; screen printed carbon electrode; peroxynitrite; cyclic voltammetry; amperometry; flow injection analysis; electrocatalysis 2,6-dihydroxynaphthalene; electropolymerization; screen printed carbon electrode; peroxynitrite; cyclic voltammetry; amperometry; flow injection analysis; electrocatalysis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Hosu, I.S.; Constantinescu-Aruxandei, D.; Jecu, M.-L.; Oancea, F.; Badea Doni, M. Peroxynitrite Sensor Based on a Screen Printed Carbon Electrode Modified with a Poly(2,6-dihydroxynaphthalene) Film. Sensors 2016, 16, 1975.

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