<?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>S0872-19042022000500347</article-id>
<article-id pub-id-type="doi">10.4152/pea.2022400503</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[A selective PVC matrix assisted potentiometric sensor for the determination of hydroxyzine hydrochloride (HDH)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Prasad]]></surname>
<given-names><![CDATA[N. Rajendra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Siddaraju]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,JSS College of Arts, Commerce and Science PG Department of Chemistry ]]></institution>
<addr-line><![CDATA[Mysuru Karnataka]]></addr-line>
<country>India</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Government First Grade College Department of Chemistry ]]></institution>
<addr-line><![CDATA[Koratagere Karnataka]]></addr-line>
<country>India</country>
</aff>
<pub-date pub-type="pub">
<day>30</day>
<month>10</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>30</day>
<month>10</month>
<year>2022</year>
</pub-date>
<volume>40</volume>
<numero>5</numero>
<fpage>347</fpage>
<lpage>362</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S0872-19042022000500347&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S0872-19042022000500347&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S0872-19042022000500347&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract A membrane sensor using an ion association complex of hydroxyzine hydrochloride (HDH) with Orange II (ORG-II) dye, in a polyvinyl chloride (PVC) matrix, has been developed and used as a selective electrode for HDH quantification in pharmaceuticals. The sensor is suitable to determine 2.2 × 10-5 - 1.1 × 10-3 mol L-1 HDH, in the pH range from 2.5 to 5.21, with the Nernstian slope of 57.41±1.04 mV/decade, under optimum conditions. The regression coefficient (RC) value of 0.999 shows a good correlation between HDH concentration and the potential measured using the proposed sensor. The sensor limit of detection (LOD) was 4.5 × 10-6 M. A standard-addition procedure was followed to study the effect of various interferents. The results revealed no variations caused by foreign ions or species. The regression equation (RE) and relative standard deviation (RSD) values, from 1.67 to 5, and from 1.86 to 4.81%, respectively, indicated the HDH-ORG sensor acceptable accuracy and precision. The RSD values of &#8804;5.67 and &lt;5% indicated the sensor acceptable robustness and ruggedness, respectively. It has been successfully used to determine HDH in tablets, and excellent results were obtained.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[HDH]]></kwd>
<kwd lng="en"><![CDATA[ORG-II]]></kwd>
<kwd lng="en"><![CDATA[ion-associate]]></kwd>
<kwd lng="en"><![CDATA[PVC]]></kwd>
<kwd lng="en"><![CDATA[membrane sensor]]></kwd>
</kwd-group>
</article-meta>
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