ELECTRODE MODIFIED WITH A POLYMER OF ANILINE AND 3-HEXYLTHIOPHENE TO BE ASSAYED IN THE SELECTIVE DETERMINATION OF NITRATE

ABSTRACT 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,...

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Autores principales:	Diaz,F. R., Pardo,M. A., Gacitua,M. A., del Valle,M. A.
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2020
Materias:	Conducting polymer ion selective electrode nitrate detection nitrate sensor polyaniline polythiophene
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072020000405023
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spelling	oai:scielo:S0717-970720200004050232020-12-03ELECTRODE MODIFIED WITH A POLYMER OF ANILINE AND 3-HEXYLTHIOPHENE TO BE ASSAYED IN THE SELECTIVE DETERMINATION OF NITRATEDiaz,F. R.Pardo,M. A.Gacitua,M. A.del Valle,M. A. Conducting polymer ion selective electrode nitrate detection nitrate sensor polyaniline polythiophene ABSTRACT 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.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.65 n.4 20202020-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072020000405023en10.4067/S0717-97072020000405023
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Conducting polymer ion selective electrode nitrate detection nitrate sensor polyaniline polythiophene
spellingShingle	Conducting polymer ion selective electrode nitrate detection nitrate sensor polyaniline polythiophene Diaz,F. R. Pardo,M. A. Gacitua,M. A. del Valle,M. A. ELECTRODE MODIFIED WITH A POLYMER OF ANILINE AND 3-HEXYLTHIOPHENE TO BE ASSAYED IN THE SELECTIVE DETERMINATION OF NITRATE
description	ABSTRACT 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.
author	Diaz,F. R. Pardo,M. A. Gacitua,M. A. del Valle,M. A.
author_facet	Diaz,F. R. Pardo,M. A. Gacitua,M. A. del Valle,M. A.
author_sort	Diaz,F. R.
title	ELECTRODE MODIFIED WITH A POLYMER OF ANILINE AND 3-HEXYLTHIOPHENE TO BE ASSAYED IN THE SELECTIVE DETERMINATION OF NITRATE
title_short	ELECTRODE MODIFIED WITH A POLYMER OF ANILINE AND 3-HEXYLTHIOPHENE TO BE ASSAYED IN THE SELECTIVE DETERMINATION OF NITRATE
title_full	ELECTRODE MODIFIED WITH A POLYMER OF ANILINE AND 3-HEXYLTHIOPHENE TO BE ASSAYED IN THE SELECTIVE DETERMINATION OF NITRATE
title_fullStr	ELECTRODE MODIFIED WITH A POLYMER OF ANILINE AND 3-HEXYLTHIOPHENE TO BE ASSAYED IN THE SELECTIVE DETERMINATION OF NITRATE
title_full_unstemmed	ELECTRODE MODIFIED WITH A POLYMER OF ANILINE AND 3-HEXYLTHIOPHENE TO BE ASSAYED IN THE SELECTIVE DETERMINATION OF NITRATE
title_sort	electrode modified with a polymer of aniline and 3-hexylthiophene to be assayed in the selective determination of nitrate
publisher	Sociedad Chilena de Química
publishDate	2020
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072020000405023
work_keys_str_mv	AT diazfr electrodemodifiedwithapolymerofanilineand3hexylthiophenetobeassayedintheselectivedeterminationofnitrate AT pardoma electrodemodifiedwithapolymerofanilineand3hexylthiophenetobeassayedintheselectivedeterminationofnitrate AT gacituama electrodemodifiedwithapolymerofanilineand3hexylthiophenetobeassayedintheselectivedeterminationofnitrate AT delvallema electrodemodifiedwithapolymerofanilineand3hexylthiophenetobeassayedintheselectivedeterminationofnitrate
_version_	1714200954276937728

ELECTRODE MODIFIED WITH A POLYMER OF ANILINE AND 3-HEXYLTHIOPHENE TO BE ASSAYED IN THE SELECTIVE DETERMINATION OF NITRATE

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