Aplicación de técnicas quimiométricas a la resolución de señales electroquímicas solapadas

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Aplicación de técnicas quimiométricas a la resolución de señales electroquímicas solapadas

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dc.contributor.advisor Naranjo Rodríguez, Ignacio
dc.contributor.advisor Hidalgo Hidalgo de Cisneros, José Luis
dc.contributor.author Palacios Santander, José María
dc.contributor.other Química Analítica en_US
dc.date.accessioned 2012-04-09T11:22:10Z
dc.date.available 2012-04-09T11:22:10Z
dc.date.issued 2003-01-01T00:00:00Z
dc.identifier.isbn 8496274101
dc.identifier.uri http://hdl.handle.net/10498/14704
dc.description.abstract In this Doctoral Thesis, the problem of selectivity in electrochemical signals has been tackled by using chemometric techniques. The aim of the work was the resolution of hardly overlapped electrochemical signals making use of novel statistical techniques for the design and interpretation of experiments. In this way, several mathematic algorithms were developed in collaboration with an Italian research group from Universita degli Studi di Modena e Reggio Emilia (Modena-ITALY). Amongst the statistical techniques applied, Fast Wavelet Transform (FWT) and Artificial Neural Networks (ANN) can be underlined, as well as several multivariate calibration methods: Multilinear Regression (MLR), Partial-Least Squares Regression (PLS) and Principal Component Regression (PCR).The chemometric methodology developed has been applied to certain electrochemical systems of different complexity: the first one, inorganic, constituted by thallium and lead ions, and the other one, organic, constituted by four chlorophenols: 4 methyl-3-chlorophenol (MF), 4-chlorophenol (CF), 2,4-dichlorophenol (DCF) and 2,4,6-trichlorophenol (TCF). Both systems were studied with amperometric electrochemical sensors: the hanging mercury drop electrode, for the inorganic mixtures, and Sonogel-Carbon electrodes, recently developed by our research group, for the organic system. With respect to the inorganic system, low errors were obtained for the individual concentration values of the two metallic ions in every mixture. In the case of the system composed by four chlorophenols, the best predictions (the lowest errors) of concentration were for the TCF analyte; the rest of the chlorophenols registered an increasing order of errors as follows: MF < DCF < CF. Finally, it has to be noticed that the grade of overlapping studied in both situations was very high; the concentration values of the organic chemical species were always very close to the Sonogel-Carbon detection limit for this compounds and under the values reported in literature; besides, the processes of feature selection based on wavelet transform with the aim of resolve an electrochemical system implies a rather novel application. en_US
dc.format application/pdf
dc.language.iso spa en_US
dc.relation.ispartofseries Tesis UCA
dc.rights Attribution-NonCommercial-NoDerivs 3.0 Unported
dc.rights info:eu-repo/semantics/openAccess
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/
dc.source Dissertation Abstracts International, Volume: 64-12, Section: B, page: 6063 en_US
dc.subject chemistry, analytical en_US
dc.subject computer science en_US
dc.subject química analítica en_US
dc.subject informática en_US
dc.title Aplicación de técnicas quimiométricas a la resolución de señales electroquímicas solapadas en_US
dc.title.alternative Application of chemometric techniques to the resolution of overlapped electrochemical signals en_US
dc.type info:eu-repo/semantics/doctoralThesis en_US
dc.identifier.url http://proquest.umi.com/pqdweb?did=765225151&Fmt=2&clientId=47941&RQT=309&VName=PQD
dc.rights.accessRights info:eu-repo/semantics/openAccess
dc.description.physDesc 534 p.

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