<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet type="text/xsl" href="static/style.xsl"?><OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"><responseDate>2026-06-10T15:28:33Z</responseDate><request verb="GetRecord" identifier="oai:riubu.ubu.es:10259/5012" metadataPrefix="uketd_dc">https://riubu.ubu.es/oai/request</request><GetRecord><record><header><identifier>oai:riubu.ubu.es:10259/5012</identifier><datestamp>2022-04-26T11:42:13Z</datestamp><setSpec>com_10259_2699</setSpec><setSpec>col_10259_2727</setSpec></header><metadata><uketd_dc:uketddc xmlns:uketd_dc="http://naca.central.cranfield.ac.uk/ethos-oai/2.0/" xmlns:doc="http://www.lyncode.com/xoai" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:uketdterms="http://naca.central.cranfield.ac.uk/ethos-oai/terms/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:dc="http://purl.org/dc/elements/1.1/" xsi:schemaLocation="http://naca.central.cranfield.ac.uk/ethos-oai/2.0/ http://naca.central.cranfield.ac.uk/ethos-oai/2.0/uketd_dc.xsd">
<dc:title>Determinación electroquímica de vanadio y tungsteno en aguas con electrodos serigrafiados modificados con nanomateriales y enzimas</dc:title>
<dcterms:alternative>Electrochemical determination of vanadium and tungsten in water, with screen printed carbon electrodes modified with nanomaterials and enzymes</dcterms:alternative>
<dc:creator>Alvarado Gámez, Ana Lorena</dc:creator>
<uketdterms:advisor>Arcos Martínez, Julia</uketdterms:advisor>
<dcterms:abstract>Se han desarrollado diferentes biosensores amperométricos basados en SPCE para determinar vanadio y tungsteno como contaminantes emergentes en aguas, mediante inhibición de la actividad enzimática de la fosfatasa alcalina sobre los sustratos 5-monofosfato de riboflavina y p-nitrofenilfosfato para vanadio, y para tungsteno  la fosfatasa alcalina con 2-fosfo-L-ascorbato trisódico y la enzima lacasa sobre catecol. Se utilizaron electrodos SPCE modificados con AuNPs. con la enzima lacasa también se han modificado las superficies del electrodo con SAMs de ácido 3-mercaptopropiónico y con MWCNTs sobre las AuNPs.  Se evaluó el desempeño de los biosensores desarrollados, como LOD entre 3.9 M y 0.18 M, la repetibilidad y reproducibilidad, entre 8% y 2% como RSD,  además la  exactitud con patrones certificados y veracidad con muestras de agua enriquecidos con patrones certificados y recuperaciones obtenidas entre 98 y 102 %.</dcterms:abstract>
<dcterms:abstract>They were developed four amperometric biosensors to determine vanadium and tungsten as emergent contaminants in water by means of alkaline phospahatse inhibition from this metals, using riboflavine-5-monophosphate and p-nitrophenyl phosphate as substrates for vanadium, and alkaline phosphatase and 2-phospho-L-ascorbic acid, and laccase catechol respectivelly for tungsten determination. They were used modified SPCEs with AuNPs and laccase enzyme, also with SAMS from 3-mercaptopropionic acid and MWCNTs. It was evaluated the performance of the developed biosensors such as LOD between 3.9 M y 0.18 M, repeatability and reproducibility between  8% and 2% as RSD,  accuracy  with SRM standards and trueness with enriched water samples, with recoveries between 98% and 102%.</dcterms:abstract>
<dcterms:issued>2016</dcterms:issued>
<dc:type>info:eu-repo/semantics/doctoralThesis</dc:type>
<dc:language xsi:type="dcterms:ISO639-2">spa</dc:language>
<dcterms:isReferencedBy>http://hdl.handle.net/10259/5012</dcterms:isReferencedBy>
<dc:identifier xsi:type="dcterms:URI">https://riubu.ubu.es/bitstream/10259/5012/1/Alvarado_G%c3%a1mez.pdf</dc:identifier>
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<dcterms:license>https://riubu.ubu.es/bitstream/10259/5012/5/license.txt</dcterms:license>
<uketdterms:checksum xsi:type="uketdterms:MD5">5d013bfa6e473ff0db22cd82a4d71a70</uketdterms:checksum>
<dcterms:hasFormat>https://riubu.ubu.es/bitstream/10259/5012/6/Alvarado_G%c3%a1mez.pdf.txt</dcterms:hasFormat>
<uketdterms:checksum xsi:type="uketdterms:MD5">9b338d19ca119a9ff9aa532507829bd6</uketdterms:checksum>
<dc:rights>Attribution-NonCommercial-NoDerivatives 4.0 International</dc:rights>
<dc:subject>fosfatasa alcalina</dc:subject>
<dc:subject>lacasa</dc:subject>
<dc:subject>nanopartículas de oro</dc:subject>
<dc:subject>electrodos serigrafiados de carbono SPCE</dc:subject>
<dc:subject>tungsteno</dc:subject>
<dc:subject>alkaline phosphatase</dc:subject>
<dc:subject>laccase</dc:subject>
<dc:subject>gold nanoparticles</dc:subject>
<dc:subject>screen printed carcon electrodes</dc:subject>
<dc:subject>tungsten</dc:subject>
<dc:subject>Química analítica</dc:subject>
<dc:subject>Chemistry, Analytic</dc:subject>
<dc:identifier>10.36443/10259/5012</dc:identifier>
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