Carbon black as successful screen-printed electrode modifier for phenolic compound detection |
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| Institution: | 1. Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy;2. INBB, Viale Medaglie d''Oro 305, 00100 Rome, Italy;3. Facoltà di Bioscienze Tecnologie Agroalimentari e Ambientali, Università di Teramo, Via C. Lerici 1, 64023 Mosciano S.A., Italy;1. Department of Chemistry, Federal University of São Carlos, 13565-970 São Carlos, SP, Brazil;2. Nanomedicine and Nanotoxicology Group, São Carlos Institute of Physics, University of São Paulo, 13566-590 São Carlos, SP, Brazil;3. Center of Nature Sciences, Federal University of São Carlos, 18290-000 Buri, SP, Brazil;4. Department of Nature Sciences, Mathematics and Education, Federal University of São Carlos, 13600-970 Araras, SP, Brazil |
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| Abstract: | We report a miniaturized and disposable electrochemical sensor for phenolic compound detection. The sensor was constructed by modifying the working electrode surface of screen-printed electrode (SPE) with carbon black (CB) dispersion. This new probe showed higher sensitivity and better resistance to fouling than the bare SPE, displaying the suitability of CB as an excellent nanomodifier of SPE for phenolic compound detection. Catechol, gallic acid, caffeic acid, and tyrosol were detected by square wave voltammetry with a detection limit of 0.1 μM, 1 μM, 0.8 μM, and 2 μM, respectively. The sensor was able to selectively discriminate the mono-phenols and ortho-diphenols with rapid and easy measurement, paving the way to use a cost-effective device for quality control of foods and beverages containing phenolic compounds. |
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