Electrochemical characterization of an EIS sensor functionalized with a TOPO doped polymeric layer for Cr(VI) detection |
| |
| Affiliation: | 1. Université de Jijel, B.P. 98, Ouled Aissa, 18000 Jijel, Algeria;2. Université de Annaba, B.P. 12, El-Hadjar, Annaba, Algeria;3. LSA, UMR 5180 CNRS, université Claude-Bernard–Lyon-1, 69622 Villeurbanne cedex, France;4. Laboratori de Nanobioenginyeria-IBEC, CIBER, Parc Cientific de Barcelona (PCB) - Departament d’Electrónica. Universitat de Barcelona, C/Martí i Franqués 1, 08028 Barcelona, Spain |
| |
| Abstract: | A hexavalent chromium-selective sensor, based on polymeric membranes containing trioctylphosphine oxide (TOPO) deposited on a Si/SiO2/Si3N4 structure, has been developed. The ion-sensitivity of TOPO was investigated by capacitance measurements (C-V) and electrochemical impedance spectroscopy. A quasi-nernstian response for Cr2O72− exchange is shown. Selectivity coefficients and detection limits of Cr(VI) in the presence of interfering anions were determined experimentally using the fixed interference method. A detection limit of 10−5 M of Cr(VI) is obtained even in presence of sulphate and chloride ions. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
