<?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>0188-4999</journal-id>
<journal-title><![CDATA[Revista internacional de contaminación ambiental]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Int. Contam. Ambient]]></abbrev-journal-title>
<issn>0188-4999</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias de la Atmósfera y Cambio Climático]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-49992020000100045</article-id>
<article-id pub-id-type="doi">10.20937/rica.2020.36.53391</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[VALIDACIÓN DE UNA METODOLOGÍA PARA LA DETERMINACIÓN DE As (III) Y As(V) EN AGUAS DE CONSUMO HUMANO POR CROMATOGRAFÍA DE INTERCAMBIO ANIÓNICO Y ESPECTROMETRÍA DE MASAS CON PLASMA DE ACOPLAMIENTO INDUCTIVO]]></article-title>
<article-title xml:lang="en"><![CDATA[VALIDATION OF A METHODOLOGY TO DETERMINE As(III) AND As(V) IN DRINKING WATER BY ANION EXCHANGE CHROMATOGRAPHY AND INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arias-Barrantes]]></surname>
<given-names><![CDATA[Betzabel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Urbina-Campos]]></surname>
<given-names><![CDATA[Azucena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alvarado-Gámez]]></surname>
<given-names><![CDATA[Ana Lorena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Costarricense de Acueductos y Alcantarillados Laboratorio Nacional de Aguas ]]></institution>
<addr-line><![CDATA[San José ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Costa Rica Escuela de Química Centro de Investigación en Contaminación Ambiental]]></institution>
<addr-line><![CDATA[San José ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<volume>36</volume>
<numero>1</numero>
<fpage>45</fpage>
<lpage>53</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992020000100045&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992020000100045&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992020000100045&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Se optimizó y validó una metodología para la determinación de arsénico soluble y particulado (As[III] y As[V]) en aguas de consumo humano (ACH) empleando cromatografía de intercambio aniónico (CIA) y espectrometría de masas con plasma de acoplamiento inductivo (ICP-MS). La optimización de CIA consistió en una simulación en el laboratorio del procedimiento a seguir en el campo, donde se evaluó la recuperación de 10 mezclas de disoluciones de As(III)/As(V) en agua sintética. Se obtuvieron las siguientes figuras de mérito en el análisis de arsénico total: límite de detección (LD) de 0.1 µg/L, límite de cuantificación (LC) de 0.2 µg/L, ámbito lineal de 0.1 µg/L a 300 µg/L y coeficientes de determinación &#8804; 0.9996. La repetibilidad y repetibilidad intermedia fueron evaluadas mediante la lectura de un patrón de 12.5 µg/L de arsénico total: el promedio de repetibilidad fue de 12.6 µg/L con una desviación estándar (S0) de 0.2 µg/L y un coeficiente de variación (CV) de 0.2 % para n = 7, mientras que la repetibilidad intermedia tuvo un promedio de 12.6 µg/L con S0 = 0.4 µg/L y un CV de 0.3 % para n = 7. Las recuperaciones promedio fueron: arsénico total &#8804; 99 %, arsénico soluble &#8804; 99 %, y arsenito y arseniato &#8804; 97 %.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT A methodology was optimized and validated for the determination of soluble and particulate arsenic (As[III] and As[V]) in drinking water using anion exchange chromatography (AEC) and inductively coupled plasma mass spectrometry (ICP-MS). The AEC optimization consisted in a laboratory simulation of the procedure to be followed in the field to evaluate the recovery of 10 mixtures of As(III) and As(V) in synthetic water. The following figures of merit were obtained in the total arsenic analysis: detection limit (LOD) of 0.1 &#956;g/L, quantification limit (LOQ) of 0.2 &#956;g/L, linear range between 0.1 &#956;g/L and 300 &#956;g/L, and coefficients of determination &#8804; 0.9996. Repeatability and intermediate repeatability were evaluated with a total arsenic standard solution of 12.5 &#956;g/L, obtaining an average repeatability of 12.6 &#956;g/L with a standard deviation of 0.2 % and a coefficient variation of 0.2 % for n = 7, while the intermediate precision had an average of 12.6 µg/L with a standard deviation of 0.4 % and a coefficient variation of 0.3 % for n = 7.. The average recoveries in the mixtures were: total arsenic &#8804; 99 %, soluble arsenic &#8804; 99 % and for arsenite and arsenate &#8804; 97 %.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[arsénico]]></kwd>
<kwd lng="es"><![CDATA[arsenito]]></kwd>
<kwd lng="es"><![CDATA[arseniato]]></kwd>
<kwd lng="es"><![CDATA[arsénico soluble]]></kwd>
<kwd lng="es"><![CDATA[arsénico particulado]]></kwd>
<kwd lng="es"><![CDATA[ICP-MS]]></kwd>
<kwd lng="es"><![CDATA[estados de oxidación]]></kwd>
<kwd lng="en"><![CDATA[arsenic]]></kwd>
<kwd lng="en"><![CDATA[arsenite]]></kwd>
<kwd lng="en"><![CDATA[arsenate]]></kwd>
<kwd lng="en"><![CDATA[soluble arsenic]]></kwd>
<kwd lng="en"><![CDATA[particulate arsenic]]></kwd>
<kwd lng="en"><![CDATA[ICP-MS]]></kwd>
<kwd lng="en"><![CDATA[oxidation states]]></kwd>
</kwd-group>
</article-meta>
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<article-title xml:lang=""><![CDATA[Arsenic in drinking water. A global environmental problem]]></article-title>
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<volume>81</volume>
<numero>2</numero>
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</article>
