<?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>0872-1904</journal-id>
<journal-title><![CDATA[Portugaliae Electrochimica Acta]]></journal-title>
<abbrev-journal-title><![CDATA[Port. Electrochim. Acta]]></abbrev-journal-title>
<issn>0872-1904</issn>
<publisher>
<publisher-name><![CDATA[Sociedade Portuguesa de Electroquímica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0872-19042022000100059</article-id>
<article-id pub-id-type="doi">10.4152/pea.2022400105</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Low Cost Electrochemical Sensor for Simultaneous Detection and Estimation of Dihydroxybenzene Isomers]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tonu]]></surname>
<given-names><![CDATA[N.T.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Yousuf]]></surname>
<given-names><![CDATA[M.A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Khulna University of Engineering &amp; Technology Department of Chemistry ]]></institution>
<addr-line><![CDATA[Khulna ]]></addr-line>
<country>Bangladesh</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Khulna University  ]]></institution>
<addr-line><![CDATA[Khulna ]]></addr-line>
<country>Bangladesh</country>
</aff>
<pub-date pub-type="pub">
<day>20</day>
<month>02</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>20</day>
<month>02</month>
<year>2022</year>
</pub-date>
<volume>40</volume>
<numero>1</numero>
<fpage>59</fpage>
<lpage>71</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S0872-19042022000100059&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S0872-19042022000100059&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S0872-19042022000100059&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract An ionic liquid (IL) based pencil graphite electrode (PGE) sensor was electrochemically fabricated for hydroquinone (HQ), catechol (CC) and resorcinol (RS) simultaneous detection and estimation in aqueous media. PGE surface was modified by 1-hexylpyridinium hexafluorophosphate (HPHP) using cyclic voltammetry (CV). The modified surface was characterized by scanning electron microscope (SEM) and energy dispersive X-ray microanalysis (EDX). The modified electrode showed an excellent electro-analytical activity towards simultaneously HQ, CC and RS, at pH 6.8 in aqueous media. The scan rate effect was diffusion controlled and the concentration effect was linear with current. The limit of detection (LOD) for HQ, CC and RS was found to be 6.38 &#956;mol Lı, 4.56 &#956;mol Lı and 19.6 &#956;mol Lı, respectively. The sensitivity for HQ, CC and RS was found to be 448.49 &#956;AmM-1cm-2, 627.35 &#956;AmM-1cm-2 and 146.10 &#956;AmM&#8722;1cm&#8722;2, respectively, in a ternary mixture of dihydroxybenzene isomers (DHBIs). The cost of using PGE was lower than that of the conventional electrodes.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Dihydroxybenzene isomers]]></kwd>
<kwd lng="en"><![CDATA[ionic liquid]]></kwd>
<kwd lng="en"><![CDATA[pencil graphite electrode and differential pulse voltammetry]]></kwd>
</kwd-group>
</article-meta>
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<year>2008</year>
<volume>8</volume>
<page-range>5792-805</page-range></nlm-citation>
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