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
Ioana Silvia Hosu, Diana Constantinescu-Aruxandei, Maria-Luiza Jecu, Florin Oancea
and Mihaela Badea Doni *
and Mihaela Badea Doni *
National Institute for Research & Development in Chemistry and Petrochemistry—ICECHIM, Biotechnology Department, 202 Spl. Independentei, Sector 6, Bucharest, Romania
*
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)
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-TextKeywords:
2,6-dihydroxynaphthalene; electropolymerization; screen printed carbon electrode; peroxynitrite; cyclic voltammetry; amperometry; flow injection analysis; electrocatalysis
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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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