<?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>0379-3982</journal-id>
<journal-title><![CDATA[Revista Tecnología en Marcha]]></journal-title>
<abbrev-journal-title><![CDATA[Tecnología en Marcha]]></abbrev-journal-title>
<issn>0379-3982</issn>
<publisher>
<publisher-name><![CDATA[Instituto Tecnológico de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0379-39822018000200040</article-id>
<article-id pub-id-type="doi">10.18845/tm.v31i2.3623</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Adecuación de metodologías para análisis de sodio y potasio por espectroscopia de absorción atómica, en sales de rehidratación oral]]></article-title>
<article-title xml:lang="en"><![CDATA[Adequacy of methodologies for analysis of sodium and potassium by atomic absorption spectroscopy in oral rehydration salts]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-López]]></surname>
<given-names><![CDATA[Esteban]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Esquivel-Arias]]></surname>
<given-names><![CDATA[Raquel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Costa Rica  ]]></institution>
<addr-line><![CDATA[Grecia ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Costa Rica  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<volume>31</volume>
<numero>2</numero>
<fpage>40</fpage>
<lpage>57</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0379-39822018000200040&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0379-39822018000200040&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0379-39822018000200040&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El presente artículo expone la adecuación de dos métodos de análisis por espectroscopía de absorción atómica para la cuantificación de sodio y potasio en sales de rehidratación oral, partiendo de metodologías de la USP y AOAC, para un laboratorio farmacéutico en Costa Rica. Primero se indagó en métodos oficiales aplicables a la determinación de sodio y potasio. A partir de estas, se plantearon pruebas que permitieron adecuar el rango de concentraciones de trabajo para espectroscopía de absorción atómica; se obtuvo que para el sodio el intervalo es adecuado entre 0,5 y 1,0 &#956;g/ml y para el potasio entre 0,5 - 1,5 &#956;g/ml. En una segunda etapa se planteó la preparación de la muestra considerando dos formas, reconstituyendo el contenido total de la presentación del medicamento y mediante la dilución de una masa conocida de muestra, para determinar cuál procedimiento era más efectivo; la reconstitución resultó lo más adecuado. Además, se completó la validación de ambos métodos contemplando los parámetros: intervalo, linealidad, exactitud, repetibilidad y precisión intermedia, y se obtuvieron resultados satisfactorios según lo establecido por la guía del Ministerio de Salud. Por último, se sometieron a análisis de sodio y potasio, tres lotes del producto en cuestión con los métodos validados, y se obtuvieron resultados muy favorables dentro de la especificación USP (90-110%).]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This article discusses the suitability of two methods of analysis by atomic absorption spectroscopy for the quantification of sodium and potassium in oral rehydration salts, based on USP and AOAC methodologies for a pharmaceutical laboratory in Costa Rica. First we inquired into official methods applicable to the determination of sodium and potassium. From these, tests were proposed that allowed to adjust the range of concentrations of work for atomic absorption spectroscopy; It was obtained that for the sodium the range is suitable between 0.5 and 1.0 &#956;g / ml and for potassium between 0.5 - 1.5 &#956;g / ml. In a second stage the preparation of the sample was considered considering two forms, reconstituting the total content of the presentation of the drug and by the dilution of a known sample mass, to determine which procedure was most effective; Reconstitution was the most appropriate. In addition, the validation of both methods was completed considering the parameters: interval, linearity, accuracy, repeatability and intermediate accuracy, and satisfactory results were obtained according to the guidelines of the Ministry of Health. Finally, three batches of the product in question with the validated methods were subjected to sodium and potassium analysis, and very favorable results were obtained within the USP specification (90-110%).]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Sodio]]></kwd>
<kwd lng="es"><![CDATA[potasio]]></kwd>
<kwd lng="es"><![CDATA[espectroscopía absorción atómica]]></kwd>
<kwd lng="es"><![CDATA[validación de método]]></kwd>
<kwd lng="en"><![CDATA[Sodium]]></kwd>
<kwd lng="en"><![CDATA[potassium]]></kwd>
<kwd lng="en"><![CDATA[atomic absorption spectroscopy]]></kwd>
<kwd lng="en"><![CDATA[method validation]]></kwd>
</kwd-group>
</article-meta>
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