<?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>1870-249X</journal-id>
<journal-title><![CDATA[Journal of the Mexican Chemical Society]]></journal-title>
<abbrev-journal-title><![CDATA[J. Mex. Chem. Soc]]></abbrev-journal-title>
<issn>1870-249X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Química de México A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-249X2010000400010</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Sensitive and Selective Extractive Spectrophotometric Method for the Determination of Hydroxyzine Dihydrochloride in Pharmaceuticals]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rajendraprasad]]></surname>
<given-names><![CDATA[Nagaraju]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Basavaiah]]></surname>
<given-names><![CDATA[Kanakapura]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vinay]]></surname>
<given-names><![CDATA[Kanakapura Basavaiah]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Revanasiddappa]]></surname>
<given-names><![CDATA[Hosakere Doddarevanna]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,University of Mysore Department of Studies in Chemistry ]]></institution>
<addr-line><![CDATA[Mysore ]]></addr-line>
<country>India</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2010</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2010</year>
</pub-date>
<volume>54</volume>
<numero>4</numero>
<fpage>233</fpage>
<lpage>239</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-249X2010000400010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-249X2010000400010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-249X2010000400010&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Hydroxyzine dihydrochloride (HDH), a piperazine H1-receptor antagonist and antihistamine, is a rapid acting anxiolytic used principally as an antiemetic. A sensitive, selective, and precise and accurate spectrophotometric method based on the formation of an ion-pair with orange II (ORG II) as ion-pair complexing agent was developed and validated for the determination of HDH in pharmaceuticals. The chloroform-extractable ion-pair complex exhibited an absorption maximum at 480 nm. Optimization of different experimental conditions is described. Beer's law is obeyed in the range of 1.5-15 &#956;g mL-1 with an apparent molar absorptivity value of 2.07 × 10(4) L mol-1 cm-1 and Sandell's sensitivity value of 0.0216 &#956;g cm-2. The limit of detection (LOD) and limit of quantification (LOQ) are 0.14 and 0.41 &#956;g mL-1, respectively. A Job's plot of absorbance versus molar ratio of HDH to ORG II indicated (1:2) stoichiometric ratio. Within-and between-day relative standard deviations at three different concentration levels were < 3%. The developed method was successfully applied to commercial tablets. The results obtained were in good agreement with those obtained using the official method. No interference was encountered from coformulated substances. Recoveries were 96-109 %.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[El dihidrocloruro de hidroxicina (HDH), una piperazina antagonista del receptor H1 y un antihistamínico, es un ansiolítico de acción rápida usado principalmente como anti-emético. Se desarrolló y validó un método espectrofotométrico sensible, selectivo, preciso y exacto basado en la formación de un par iónico con naranja II (ORG II) como un agente complejante para la determinación de HDH en productos farmacéuticos. El par iónico extraído en cloroformo exhibió un máximo de absorción a 480 nm. Se describió la optimización de las diferentes condiciones experimentales. La ley de Beer se obedeció en el intervalo de 1.5-15 &#956;g mL-1 con un valor de absortividad molar aparente de 2.07 × 10(4) L mol-1 cm-1 y un valor de sensibilidad de Sandell de 0.0216 &#956;g cm-2. El límite de detección (LD) y el límite de cuantificación (LC) son 0.14 y 0.41 &#956;g mL-1, respectivamente. Una gráfica de Job de absorbancia versus relación molar de HDH y ORG II indicó una relación estequiométrica (1:2). Las desviaciones estándar relativas dentro y entre días, a tres diferentes niveles de concentración, fueron < 3%. El método desarrollado fue aplicado exitosamente a tabletas comerciales. Los resultados obtenidos estuvieron en buena concordancia con los obtenidos con el método oficial. No se encontró ninguna interferencia de parte de las sustancias de la formulación. Las recuperaciones fueron de 96-109 %.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Spectrophotometry]]></kwd>
<kwd lng="en"><![CDATA[hydroxyzine]]></kwd>
<kwd lng="en"><![CDATA[orange II]]></kwd>
<kwd lng="en"><![CDATA[pharmaceuticals]]></kwd>
<kwd lng="es"><![CDATA[Espectrofotometría]]></kwd>
<kwd lng="es"><![CDATA[hidroxicina]]></kwd>
<kwd lng="es"><![CDATA[naranja II]]></kwd>
<kwd lng="es"><![CDATA[productos farmacéuticos]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="justify"><font face="verdana" size="4">Article</font></p>     <p align="justify"><font face="verdana" size="4">&nbsp;</font></p>     <p align="center"><font face="verdana" size="4"><b>Sensitive and Selective Extractive Spectrophotometric Method for the Determination of Hydroxyzine Dihydrochloride in Pharmaceuticals</b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>Nagaraju Rajendraprasad, Kanakapura Basavaiah,* Kanakapura Basavaiah Vinay and Hosakere Doddarevanna Revanasiddappa</b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i>Department of Studies in Chemistry, Manasagangothri, University of Mysore, Mysore 570 006, India. e&#150;mail: </i><a href="mailto:basavaiahk@yahoo.co.in">basavaiahk@yahoo.co.in</a></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">Received June 17, 2010.    <br> Accepted September 10, 2010.</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>     <p align="justify"><font face="verdana" size="2">Hydroxyzine dihydrochloride (HDH), a piperazine H<sub>1</sub>&#150;receptor antagonist and antihistamine, is a rapid acting anxiolytic used principally as an antiemetic. A sensitive, selective, and precise and accurate spectrophotometric method based on the formation of an ion&#150;pair with orange II (ORG II) as ion&#150;pair complexing agent was developed and validated for the determination of HDH in pharmaceuticals. The chloroform&#150;extractable ion&#150;pair complex exhibited an absorption maximum at 480 nm. Optimization of different experimental conditions is described. Beer's law is obeyed in the range of 1.5&#150;15 &#956;g mL<sup>&#150;1</sup> with an apparent molar absorptivity value of 2.07 &times; 10<sup>4</sup> L mol<sup>&#150;1</sup> cm<sup>&#150;1</sup> and Sandell's sensitivity value of 0.0216 &#956;g cm<sup>&#150;2</sup>. The limit of detection (LOD) and limit of quantification (LOQ) are 0.14 and 0.41 &#956;g mL<sup>&#150;1</sup>, respectively. A Job's plot of absorbance versus molar ratio of HDH to ORG II indicated (1:2) stoichiometric ratio. Within&#150;and between&#150;day relative standard deviations at three different concentration levels were &lt; 3%. The developed method was successfully applied to commercial tablets. The results obtained were in good agreement with those obtained using the official method. No interference was encountered from coformulated substances. Recoveries were 96&#150;109 %.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Keywords:</b> Spectrophotometry, hydroxyzine, orange II, pharmaceuticals.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>     <p align="justify"><font face="verdana" size="2">El dihidrocloruro de hidroxicina (HDH), una piperazina antagonista del receptor H<sub>1</sub> y un antihistam&iacute;nico, es un ansiol&iacute;tico de acci&oacute;n r&aacute;pida usado principalmente como anti&#150;em&eacute;tico. Se desarroll&oacute; y valid&oacute; un m&eacute;todo espectrofotom&eacute;trico sensible, selectivo, preciso y exacto basado en la formaci&oacute;n de un par i&oacute;nico con naranja II (ORG II) como un agente complejante para la determinaci&oacute;n de HDH en productos farmac&eacute;uticos. El par i&oacute;nico extra&iacute;do en cloroformo exhibi&oacute; un m&aacute;ximo de absorci&oacute;n a 480 nm. Se describi&oacute; la optimizaci&oacute;n de las diferentes condiciones experimentales. La ley de Beer se obedeci&oacute; en el intervalo de 1.5&#150;15 &#956;g mL<sup>&#150;1</sup> con un valor de absortividad molar aparente de 2.07 &times; 10<sup>4</sup> L mol<sup>&#150;1</sup> cm<sup>&#150;1</sup> y un valor de sensibilidad de Sandell de 0.0216 &#956;g cm<sup>&#150;2</sup>. El l&iacute;mite de detecci&oacute;n (LD) y el l&iacute;mite de cuantificaci&oacute;n (LC) son 0.14 y 0.41 &#956;g mL<sup>&#150;1</sup>, respectivamente. Una gr&aacute;fica de Job de absorbancia versus relaci&oacute;n molar de HDH y ORG II indic&oacute; una relaci&oacute;n estequiom&eacute;trica (1:2). Las desviaciones est&aacute;ndar relativas dentro y entre d&iacute;as, a tres diferentes niveles de concentraci&oacute;n, fueron &lt; 3%. El m&eacute;todo desarrollado fue aplicado exitosamente a tabletas comerciales. Los resultados obtenidos estuvieron en buena concordancia con los obtenidos con el m&eacute;todo oficial. No se encontr&oacute; ninguna interferencia de parte de las sustancias de la formulaci&oacute;n. Las recuperaciones fueron de 96&#150;109 %.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Palabras clave:</b> Espectrofotometr&iacute;a, hidroxicina, naranja II, productos farmac&eacute;uticos.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><a href="/pdf/jmcs/v54n4/v54n4a10.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>     ]]></body>
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