Journal
APPLIED SCIENCES-BASEL
Volume 11, Issue 17, Pages -Publisher
MDPI
DOI: 10.3390/app11178045
Keywords
electrochemical sensor; cyclic voltammetry; glassy carbon electrode; gallic acid; vanillic acid; electrochemical detection
Categories
Funding
- project INVALOR: Research Infrastructure for Waste Valorization and Sustainable Management - Operational Programme Competitiveness, Entrepreneurship and In-novation (NSRF 2014-2020) [MIS 5002495]
- European Union (European Regional Development Fund)
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An inexpensive and practical method was explored to detect phenolic compounds in wastewater using a simple one compartment three-electrode cell and cyclic voltammetry measurements. The electrooxidation current density value correlated linearly with the concentration of each phenolic compound, but only qualitative analysis was possible for a 1:1 mixture of these phenols.
In the present study, an inexpensive and practical way to detect phenolic compounds in wastewater was investigated. By using a simple one compartment three-electrode cell and performing cyclic voltammetry measurements, it was possible to quantitatively determine the presence of gallic and vanillic acid in acidic aqueous solutions due to their electrooxidation upon potential scanning. In the case of gallic acid, two oxidation peaks were observed whereas the vanillic acid cyclic voltammograms consisted of two oxidation and one reduction peaks. Correlation of the observed electrooxidation current density value with the concentration of each phenolic compound led to a linear relationship. Following the above methodology for a 1:1 mixture of these phenols, it was found that only a qualitative analysis was possible rather than a quantitative one.
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