| Full text | |
| Author(s): |
Barragan, Jose T. C.
[1]
;
da Silva, Everson T. S. G.
[1]
;
de Moraes, Ana C. M.
[1]
;
Kubota, Lauro T.
[1]
Total Authors: 4
|
| Affiliation: | [1] Univ Estadual Campinas, Inst Chem, Dept Analyt Chem, POB 6154, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | Analytica Chimica Acta; v. 1006, p. 1-9, MAY 2 2018. |
| Web of Science Citations: | 5 |
| Abstract | |
In this paper, we introduce a novel approach for the detection of electroactive analytes by using oxidant species accumulated in pseudocapacitors surface. We demonstrated that pseudocapacitors can be quickly discharged when in contact with electroactive species. Thus, the variation of potential can be monitored during the discharging process and correlated with the analyte concentration. Based on this, two electroanalytical methods were proposed: continuous discharging detection and pulsed discharging detection. As a proof of concept, these methods were employed for glucose, fructose and sucrose detection using an ion chromatograph containing an electrochemical detector. Copper vertical bar cupric oxide in alkaline medium was used as the pseudocapacitive system. The obtained results proved to be very promising and the analytical curves showed good linearity in both methods. In addition, this novel approach for the detection of saccharides based on potential variation as a result of the discharging of the pseudocapacitor in contact with the analyte is very attractive because it does not require current reading. Therefore, our approach can be applied to other pseudocapacitive systems, opening new possibilities for several electroanalytical applications. (c) 2017 Elsevier B.V. All rights reserved. (AU) | |
| FAPESP's process: | 14/50867-3 - INCT 2014: National Institute of Science and Technology in Bioanalysis |
| Grantee: | Marco Aurelio Zezzi Arruda |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 13/22127-2 - Development of novel materials strategic for integrated analytical devices |
| Grantee: | Lauro Tatsuo Kubota |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 16/04739-9 - Fabrication of fieldeffect transistors (FET) immunosensors based on chemically modified graphenes for the ultrasensitive detection of lung cancer biomarkers |
| Grantee: | Ana Carolina Mazarin de Moraes |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 15/13810-6 - Triboelectric effect as a novel tool for the development and application of point-of-care testing devices |
| Grantee: | Everson Thiago Santos Gerôncio da Silva |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |