<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0120-100X</journal-id>
<journal-title><![CDATA[Revista ION]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. ion]]></abbrev-journal-title>
<issn>0120-100X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Industrial de Santander]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-100X2024000300043</article-id>
<article-id pub-id-type="doi">10.18273/revion.v37n3-2024004</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Sweet potato peel peroxidase-modified graphene oxide electrodes for detection of hydrogen peroxide via electrochemical sensing]]></article-title>
<article-title xml:lang="es"><![CDATA[Electrodos de óxido de grafeno modificados con peroxidasa de cáscara de batata para la detección de peróxido de hidrógeno mediante sensado electroquímico]]></article-title>
<article-title xml:lang="pt"><![CDATA[Eletrodos de óxido de grafeno modificados com peroxidase da casca de batata-doce para a detecção de peróxido de hidrogênio via sensoramento eletroquímico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vega]]></surname>
<given-names><![CDATA[Miguel Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castillo]]></surname>
<given-names><![CDATA[John J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Industrial de Santander Laboratorio de Espectroscopia Atómica y Molecular ]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<volume>37</volume>
<numero>3</numero>
<fpage>43</fpage>
<lpage>54</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-100X2024000300043&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-100X2024000300043&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-100X2024000300043&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The development of efficient and sensitive detection methods for hydrogen peroxide (H2O2) is crucial for various applications in biology, medicine, and environmental monitoring. Here, we present a novel approach utilizing sweet potato peel peroxidase (BPP) extract-modified screen-printed graphene oxide electrodes (SPGOE) for the electrochemical sensing of H2O2. The SPP was characterized as having a specific activity of 478 U mg-1, an optimum pH of 8.0 and a thermostability at 60 °C with a Kinact of 7.02x10-3 min-1. In this study, we systematically investigate the fabrication process of the peroxidase batata-modified SPGOE and characterize their electrochemical performance using cyclic voltammetry technique. Scanning electron microscopy (SEM) was used to analyze the surface morphology of the modified electrodes, revealing successful enzyme immobilization with a marked increase in surface roughness and visible enzyme clusters compared to the bare SPGOE. This surface modification supports efficient electron transfer, which contributes to the sensor's enhanced electrocatalytic performance. The SPP-SPGOE demonstrates outstanding electrocatalytic performance for the reduction of H2O2, showing a linear response across the 250 &#956;M to 5 mM concentration range and a detection limit of 4.6 mM. This novel sensor, created by incorporating SPP onto the GO electrode, offers a promising electrochemical detection system for measuring H2O2 in real-world samples, which has significant biomedical and environmental applications. Overall, this study presents a versatile and efficient strategy for electrochemical sensing of H2O2 using SPP-SPGOE, paving the way for advanced analytical methodologies with broad applications in biology and beyond.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El desarrollo de métodos eficientes y sensibles para la detección de peróxido de hidrógeno (H2O2) es crucial para diversas aplicaciones en biología, medicina y monitoreo ambiental. En este trabajo, presentamos un enfoque novedoso que utiliza electrodos serigrafiados de óxido de grafeno (ESOG) modificados con extracto de peroxidasa de cáscara de batata (PCB) para la detección electroquímico de H2O2. La PCB presentó una actividad específica de 478 U mg_1, un pH óptimo de 8,0 y una termoestabilidad a 60 °C con un Kinact de 7,02x10~3 min"i. En este estudio, investigamos de manera sistemática el proceso de fabricación de los ESOG modificados con PCB y caracterizamos su desempeño electroquímico mediante la técnica de voltamperometría cíclica. Se utilizó microscopía electrónica de barrido (SEM) para analizar la morfología superficial de los electrodos modificados, revelando una inmovilización exitosa de la enzima con un marcado incremento en la rugosidad de la superficie y la presencia de cúmulos enzimáticos visibles en comparación con los ESOG sin modificar. Esta modificación superficial favorece una transferencia de electrones eficiente, lo que contribuye al desempeño electrocatalítico mejorado del sensor. El PCB-ESOG exhibió un desempeño electrocatalítico sobresaliente para la reducción de H2O2, mostrando una respuesta lineal en el rango de concentración de 250 &#956;M a 5 mM y un límite de detección de 4,6 mM. Este novedoso sensor, creado mediante la incorporación de PCB en el electrodo de óxido de grafeno, ofrece un sistema prometedor para la detección electroquímica de H2O2 en muestras reales, con aplicaciones significativas en los campos biomédico y ambiental. En conjunto, este estudio presenta una estrategia versátil y eficiente para la detección electroquímico de H2O2 utilizando PCB-ESOG, abriendo el camino para metodologías analíticas avanzadas con amplias aplicaciones en biología y otros campos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo O desenvolvimento de métodos eficientes e sensíveis para a detecção de peróxido de hidrogênio (H2O2) é crucial para diversas aplicações em biologia, medicina e monitoramento ambiental. Neste estudo, apresentamos uma abordagem inovadora utilizando eletrodos impressos de óxido de grafeno (SPGOE) modificados com extrato de peroxidase da casca de batata-doce (SPP) para o sensoramento eletroquímico de H2O2. A SPP foi caracterizada com uma atividade específica de 478 U mg"i, pH ótimo de 8,0 e estabilidade térmica a 60 °C com um Knact de 7,02x10~3 min"i. Investigamos sistematicamente o processo de fabricação dos SPGOE modificados com peroxidase de batata-doce e caracterizamos seu desempenho eletroquímico utilizando a técnica de voltametria cíclica. A microscopia eletrônica de varredura (SEM) foi empregada para analisar a morfologia da superfície dos eletrodos modificados, revelando a imobilização bem-sucedida da enzima, com um aumento marcante na rugosidade da superfície e a presença de aglomerados enzimáticos visíveis em comparação ao SPGOE não modificado. Essa modificação de superfície promove uma transferência de elétrons eficiente, contribuindo para o desempenho eletrocatalítico aprimorado do sensor. O SPP-SPGOE demonstrou desempenho eletrocatalítico excepcional na redução do H2O2, exibindo uma resposta linear na faixa de concentração de 250 &#956;M a 5 mM e um limite de detecção de 4,6 mM. Este sensor inovador, desenvolvido pela incorporação da SPP no eletrodo de óxido de grafeno, oferece um sistema promissor de detecção eletroquímica para a medição de H2O2 em amostras reais, com aplicações significativas nas áreas biomédica e ambiental. Este estudo apresenta, portanto, uma estratégia versátil e eficiente para a detecção eletroquímica de H2O2 utilizando o SPP-SPGOE, abrindo caminho para metodologias analíticas avançadas com amplas aplicações em biologia e áreas afins.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Sweet potato peel]]></kwd>
<kwd lng="en"><![CDATA[Peroxidase]]></kwd>
<kwd lng="en"><![CDATA[Cyclic voltammetry]]></kwd>
<kwd lng="en"><![CDATA[Sensing]]></kwd>
<kwd lng="en"><![CDATA[Hydrogen peroxide]]></kwd>
<kwd lng="es"><![CDATA[Cáscara de batata]]></kwd>
<kwd lng="es"><![CDATA[Peroxidasa]]></kwd>
<kwd lng="es"><![CDATA[Voltamperometría cíclica]]></kwd>
<kwd lng="es"><![CDATA[Detección]]></kwd>
<kwd lng="es"><![CDATA[Peróxido de hidrógeno]]></kwd>
<kwd lng="pt"><![CDATA[Casca de batata-doce]]></kwd>
<kwd lng="pt"><![CDATA[Peroxidase]]></kwd>
<kwd lng="pt"><![CDATA[Voltametria cíclica]]></kwd>
<kwd lng="pt"><![CDATA[Sensoramento]]></kwd>
<kwd lng="pt"><![CDATA[Peróxido de hidrogênio]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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