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Open AccessArticle

A Reagentless Amperometric Formaldehyde-Selective Chemosensor Based on Platinized Gold Electrodes

1
Department of Analytical Biotechnology, Institute of Cell Biology, Drahomanov Street 14/16, 79005 Lviv, Ukraine
2
Institute of Applied Biotechnology and Basic Sciences, University of Rzeszow, Kolbuszowa 36-100, Poland
3
Department of Chemical Engineering, Biotechnology and Materials, Ariel University, Ariel 4070000, Israel
*
Authors to whom correspondence should be addressed.
Academic Editor: Dusan Losic
Materials 2017, 10(5), 503; https://doi.org/10.3390/ma10050503
Received: 31 March 2017 / Revised: 2 May 2017 / Accepted: 3 May 2017 / Published: 6 May 2017
Fabrication and characterization of a new amperometric chemosensor for accurate formaldehyde analysis based on platinized gold electrodes is described. The platinization process was performed electrochemically on the surface of 4 mm gold planar electrodes by both electrolysis and cyclic voltamperometry. The produced electrodes were characterized using scanning electron microscopy and X-ray spectral analysis. Using a low working potential (0.0 V vs. Ag/AgCl) enabled an essential increase in the chemosensor’s selectivity for the target analyte. The sensitivity of the best chemosensor prototype to formaldehyde is uniquely high (28180 A·M−1·m−2) with a detection limit of 0.05 mM. The chemosensor remained stable over a one-year storage period. The formaldehye-selective chemosensor was tested on samples of commercial preparations. A high correlation was demonstrated between the results obtained by the proposed chemosensor, chemical and enzymatic methods (R = 0.998). The developed formaldehyde-selective amperometric chemosensor is very promising for use in industry and research, as well as for environmental control. View Full-Text
Keywords: formaldehyde; amperometric chemosensor; platinized gold electrode formaldehyde; amperometric chemosensor; platinized gold electrode
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MDPI and ACS Style

Demkiv, O.; Smutok, O.; Gonchar, M.; Nisnevitch, M. A Reagentless Amperometric Formaldehyde-Selective Chemosensor Based on Platinized Gold Electrodes. Materials 2017, 10, 503.

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