Electrochemical sensor based on rhodium nanoparticles stabilized in zwitterionic surfactant for p-coumaric acid analysis
| Autor: | Larissa Moreira Ferreira, Faruk Jose Nome Aguilera, Iolanda Cruz Vieira, Franciane D. Souza |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_element
Nanoparticle 02 engineering and technology engineering.material 01 natural sciences Catalysis p-Coumaric acid Rhodium law.invention chemistry.chemical_compound Pulmonary surfactant Coating Magazine law Organic chemistry Voltammetry 010401 analytical chemistry Organic Chemistry General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Electrochemical gas sensor chemistry engineering 0210 nano-technology Nuclear chemistry |
| Zdroj: | Canadian Journal of Chemistry. 95:113-119 |
| ISSN: | 1480-3291 0008-4042 |
| DOI: | 10.1139/cjc-2016-0338 |
| Popis: | A new sensor was developed for the analysis of phenolic compounds by coating the surface of a glassy carbon electrode (GCE) with rhodium nanoparticles stabilized in 3-(1-tetradecyl-3-imidazolium) propanesulfonate (ImS3-14), a zwitterionic surfactant. The modifier was found to lower the electron transfer resistance by enhancing the electrical conductivity on the electrode surface. Some phenolic compounds were tested to determine the increase in the electroanalytical response when employing the proposed sensor in comparison to the bare GCE. p-Coumaric acid showed the greatest peak enlargement and, thus, it was selected as the target analyte. Chronocoulometry studies indicated that the increase in the peak is due to the adsorption of the p-coumaric acid on the sensor surface. The optimized analysis conditions were obtained in acetate buffer pH 4.0 employing differential pulse voltammetry, which provided a limit of detection of 472 nmol/L. The recoveries ranged from 98.3% to 104.4%, indicating satisfactory accuracy for the proposed method. The sensor exhibited good repeatability and reproducibility (both intraday and interday) and was applied successfully in the determination of p-coumaric acid in a cellulosic matrix. |
| Databáze: | OpenAIRE |
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