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dc.contributor.authorPascual Portal, Blanca Sol 
dc.contributor.authorVallejos Calzada, Saúl 
dc.contributor.authorReglero Ruiz, José Antonio 
dc.contributor.authorBertolín Burillo, Juan Carlos 
dc.contributor.authorRepresa Pérez, César 
dc.contributor.authorGarcía García, Félix Clemente 
dc.contributor.authorGarcía Pérez, José Miguel 
dc.date.accessioned2018-11-08T08:56:24Z
dc.date.issued2019-02
dc.identifier.issn0304-3894
dc.identifier.urihttp://hdl.handle.net/10259/4998
dc.description.abstractConventional nonconductive vinylic films with dispersed aniline change their color and become conductive in the presence of specific oxidant gases, namely, chlorine and hydrogen peroxide. The color change arises from the polymerization of the aniline to yield the conjugated polymer polyaniline, which at the same time renders the flexible vinylic films conductive. We present a simple and straightforward method using both colorimetric and electrical responses to detect and quantify the presence of oxidants (Cl2 and H2O2) in the air. Using RGB analysis (red, green and blue parameters defining the colors in digital pictures on a computer display) based on different pictures taken with a smartphone of discs extracted from the films and by measuring the UV–vis spectral variation in the presence of different concentrations of Cl2 and H2O2, we obtained limits of detection and quantification between 15 and 200 ppbv for H2O2 and between 37 and 583 ppbv for Cl2. Additionally, the electrical response was measured using a fabricated device to visually detect the electrical conductivity activation of the sensor in the presence of oxidant atmospheres, detecting a rapid decrease in resistivity (three orders of magnitude) when the polymerization of aniline began, changing the film from non-conductive to conductive.en
dc.description.sponsorshipFEDER (Fondo Europeo de Desarrollo Regional) and the Spanish Agencia Estatal de Investigación (AEI) (MAT2017-84501-R)en
dc.format.mimetypeapplication/pdf
dc.language.isoenges
dc.publisherElsevieren
dc.relation.ispartofJournal of Hazardous Materials. 2019, V. 364, p. 238-243en
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectVinylic filmsen
dc.subjectDetection of oxidant atmospheresen
dc.subjectVisual detectionen
dc.subjectResistivity sensorsen
dc.subjectConductive polymersen
dc.subject.otherQuímica orgánicaes
dc.subject.otherChemistry, Organicen
dc.titleEasy and inexpensive method for the visual and electronic detection of oxidants in air by using vinylic films with embedded anilineen
dc.typeinfo:eu-repo/semantics/article
dc.date.embargo2021-02-15
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.relation.publisherversionhttps://doi.org/10.1016/j.jhazmat.2018.10.039
dc.identifier.doi10.1016/j.jhazmat.2018.10.039
dc.relation.projectIDinfo:eu-repo/grantAgreement/MICINN/MAT2017-84501-R
dc.type.hasVersioninfo:eu-repo/semantics/acceptedVersionen


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