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Metodología para la detección de cocaína en matrices poliméricas mediante técnicas electroquímicas

dc.rights.licenseAtribución-NoComercial-SinDerivadas 4.0 Internacional
dc.contributor.advisorRestrepo-Parra, Elisabeth
dc.contributor.advisorDiaz Vargas, Carlos Andrés
dc.contributor.authorPineda Hernández, Daniel Alejandro
dc.date.accessioned2022-09-13T22:19:18Z
dc.date.available2022-09-13T22:19:18Z
dc.date.issued2021-01-12
dc.identifier.urihttps://repositorio.unal.edu.co/handle/unal/82288
dc.descriptiongráficos, ilustraciones, tablas
dc.description.abstractEn el presente trabajo se desarrolló una novedosa metodología para la detección preliminar de cocaína en matrices poliméricas por medio de espectroscopia de impedancia electroquímica (EIS). Para esto, se realizó un análisis sistemático de polímeros con y sin cocaína incrustada a fin de determinar la respuesta eléctrica de estas matrices e identificar una señal característica que indique la presencia del alcaloide. Con el fin de soportar este estudio, se realizaron caracterizaciones fisicoquímicas y composicionales que validaran los resultados obtenidos por medio de EIS. Los datos obtenidos por EIS fueron analizados mediante circuitos equivalentes a fin de realizar una descripción detallada del comportamiento eléctrico de los polímeros, mediante este análisis se encontró que los polímeros sin dopaje presentan un circuito equivalente compuesto de una resistencia y un elemento de fase constante demostrando el carácter dieléctrico de estas muestras, mientras que los polímeros dopados presentan una capacitancia adicional que sugiere una doble polarización debido a la presencia de cocaína en la matriz . Adicionalmente, se validó que existe una relación entre la presencia de la cocaína incrustada en las matrices poliméricas con la resistencia eléctrica del material. La presencia del alcaloide disminuye significativamente la resistencia eléctrica del material debido a un aumento en la conductividad de la muestra producto de la estructura del dopaje. (Texto tomado de la fuente)
dc.description.abstractIn the present work, a novel methodology was developed for the preliminary detection of cocaine of cocaine embedded in polymeric matrices by electrochemical impedance spectroscopy (EIS). A systematic analysis of polymers with and without embedded cocaine was carried out to determine the electrical response of these matrices and identify a characteristic signal that indicates the presence of the alkaloid. To support this study, physicochemical and compositional characterizations were carried out to validate the results obtained through EIS. The data obtained by EIS were analyzed by means of equivalent circuits in order to carry out a detailed description of the electrical behavior of the polymers, through this analysis it was found that the polymers without doping present an equivalent circuit composed of a resistance and a constant phase element, demonstrating the dielectric character of these samples, while the doped polymers present an additional capacitance that suggests a double polarization due to the presence of cocaine in the matrix. Additionally, it was validated that there is a relationship between the presence of cocaine embedded in the polymeric matrices with the electrical resistance of the material. The presence of the alkaloid significantly decreases the electrical resistance of the material due to an increase in the conductivity of the sample because of the doping structure.
dc.format.extent54 páginas
dc.format.mimetypeapplication/pdf
dc.language.isospa
dc.publisherUniversidad Nacional de Colombia
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject.ddc620 - Ingeniería y operaciones afines::621 - Física aplicada
dc.titleMetodología para la detección de cocaína en matrices poliméricas mediante técnicas electroquímicas
dc.typeTrabajo de grado - Maestría
dc.type.driverinfo:eu-repo/semantics/masterThesis
dc.type.versioninfo:eu-repo/semantics/acceptedVersion
dc.publisher.programManizales - Ciencias Exactas y Naturales - Maestría en Ciencias - Física
dc.contributor.researchgroupLaboratorio de física del plasma
dc.description.degreelevelMaestría
dc.description.degreenameMagíster en Ciencias - Física
dc.identifier.instnameUniversidad Nacional de Colombia
dc.identifier.reponameRepositorio Institucional Universidad Nacional de Colombia
dc.identifier.repourlhttps://repositorio.unal.edu.co/
dc.publisher.departmentDepartamento de Física y Química
dc.publisher.facultyFacultad de Ciencias Exactas y Naturales
dc.publisher.placeManizales, Colombia
dc.publisher.branchUniversidad Nacional de Colombia - Sede Manizales
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dc.rights.accessrightsinfo:eu-repo/semantics/openAccess
dc.subject.proposalEIS
dc.subject.proposalCocaína
dc.subject.proposalDetección
dc.subject.proposalCamuflaje de cocaína
dc.subject.proposalMatrices poliméricas
dc.subject.proposalCocaine
dc.subject.proposalDetection
dc.subject.proposalCocaine smuggling
dc.subject.proposalPolymeric matrices
dc.subject.unescoEstupefaciente
dc.subject.unescoNarcotic drugs
dc.title.translatedMethodology for the detection of cocaine in polymeric matrices using electrochemical techniques
dc.type.coarhttp://purl.org/coar/resource_type/c_bdcc
dc.type.coarversionhttp://purl.org/coar/version/c_ab4af688f83e57aa
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oaire.awardtitleMetodología para la detección de cocaína en matrices poliméricas mediante técnicas electroquímicas
dcterms.audience.professionaldevelopmentBibliotecarios
dcterms.audience.professionaldevelopmentEstudiantes
dcterms.audience.professionaldevelopmentInvestigadores
dcterms.audience.professionaldevelopmentMaestros
dcterms.audience.professionaldevelopmentPúblico general
dc.description.curricularareaCiencias Naturales


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