ELECTRODE MODIFIED WITH A POLYMER OF ANILINE AND 3-HEXYLTHIOPHENE TO BE ASSAYED IN THE SELECTIVE DETERMINATION OF NITRATE
| dc.creator | del Valle, María Angélica | |
| dc.creator | Díaz, Fernando | |
| dc.creator | Pardo, María Angelica | |
| dc.creator | Gacitua, Manuel | |
| dc.date | 2020-11-15 | |
| dc.date.accessioned | 2021-01-29T14:14:45Z | |
| dc.date.available | 2021-01-29T14:14:45Z | |
| dc.identifier | http://www.jcchems.com/index.php/JCCHEMS/article/view/1554 | |
| dc.identifier.uri | https://revistaschilenas.uchile.cl/handle/2250/164410 | |
| dc.description | In this work, platinum electrodes are modified with poly[4-(3-hexyl-2-thiophene)-aniline], PTANIr2, and characterized by cyclic voltammetry. In the presence of nitrate in the electrolytic medium, an oxidation signal at 0.6 V vs. SCE is recorded, so the response of this modified electrode, Pt|PTANIr2, is evaluated to determine its relationship with the concentration of the anion. Thus, it is verified that the best response is achieved by chrono-amperometry, obtaining a directly proportional relationship between the charge and the concentration, in an interval between 5 and 100 mg L-1 of the anion, with r2 = 0.996. Furthermore, it is found that the response of Pt|PTANIr2 is quite selective for nitrate, since there is no response for anions such as HPO4-, PO42-, ClO4-, F-, Cl-, Br-, I-, and NO2-, thereby contributing significantly to solving the main problem of devices of this type proposed so far. Finally, the surfaces were characterized by atomic force microscopy, showing a strong anion-polymer layer interaction. Thus, this material can be proposed to be tested as a columbimetric nitrate sensor, highlighting the possibility of varying the area of the electrode and/or the thickness of the deposited polymeric layer and with it, the sensitivity of the device. | en-US |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.publisher | Sociedad Chilena de Química | en-US |
| dc.relation | http://www.jcchems.com/index.php/JCCHEMS/article/view/1554/436 | |
| dc.rights | Copyright (c) 2020 SChQ | en-US |
| dc.rights | https://creativecommons.org/licenses/by-nc-sa/4.0 | en-US |
| dc.source | Journal of the Chilean Chemical Society; Vol 65 No 4 (2020): Journal of the Chilean Chemical Society; 5023-5026 | en-US |
| dc.source | 0717-9707 | |
| dc.source | 0717-9324 | |
| dc.subject | conducting polymer | en-US |
| dc.subject | ion selective electrode | en-US |
| dc.subject | nitrate detection | en-US |
| dc.subject | nitrate sensor | en-US |
| dc.subject | polyaniline | en-US |
| dc.subject | polythiophene | en-US |
| dc.title | ELECTRODE MODIFIED WITH A POLYMER OF ANILINE AND 3-HEXYLTHIOPHENE TO BE ASSAYED IN THE SELECTIVE DETERMINATION OF NITRATE | en-US |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/publishedVersion |