<?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>S0188-49992019000100065</article-id>
<article-id pub-id-type="doi">10.20937/rica.2019.35.01.05</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[ADECUABILIDAD Y COMPARACIÓN DE TÉCNICAS ESPECTROSCÓPICAS PARA EL ANÁLISIS DE MUESTRAS DE ORIGEN GEOLÓGICO]]></article-title>
<article-title xml:lang="en"><![CDATA[SUITABILITY AND COMPARISON OF SPECTROSCOPIC TECHNIQUES FOR THE ANALYSIS OF GEOLOGICAL SAMPLES]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zamora-Martínez]]></surname>
<given-names><![CDATA[Olivia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lozano-Santa Cruz]]></surname>
<given-names><![CDATA[Rufino]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Samayoa-Oviedo]]></surname>
<given-names><![CDATA[Hugo Yuset]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velázquez-Castro]]></surname>
<given-names><![CDATA[Mariana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Prado-Pano]]></surname>
<given-names><![CDATA[Blanca]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Geología ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Laboratorio Nacional de Geoquímica y Mineralogía ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<volume>35</volume>
<numero>1</numero>
<fpage>65</fpage>
<lpage>79</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992019000100065&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992019000100065&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992019000100065&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Se optimizaron y adecuaron cuatro metodologías analíticas para la determinación de especies químicas de interés ambiental. Por medio de la técnica de espectroscopia de absorción atómica con flama (EAA-F) fue posible cuantificar de manera secuencial las concentraciones de Fe, Mn, Cu, Cr, Ni, Pb y Zn en muestras de sedimentos, suelos y rocas. Mediante la formación de complejos coloridos de especies de hierro, obtenidos en condiciones de reacción específicas y bien definidas, y su posterior cuantificación mediante espectroscopia visible con metodologías independientes, fue posible la determinación del contenido de hierro total, Fe2+ y Fe3+ en lixiviados de mina. Las metodologías descritas resultaron ser precisas y exactas, se encuentran libres de interferencias de matriz y son comparables con otras metodologías ya validadas. Los intervalos de linealidad en EAA-F para los siete elementos varían de 0.05 a 16 mg/L, con límites de detección comprendidos entre 0.03 y 0.2 mg/L. Con relación a las determinaciones colorimétricas de Fe total, Fe2+ y Fe3+ en muestras de lixiviados mineros sulfurados, se observaron intervalos lineales de concentración comprendidos entre 0.05 y 17.5 mg/L. Los límites de detección obtenidos fueron de 0.05 mg/L para Fe total y Fe2+ y de 0.14 mg/L para Fe3+.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Four analytical methodologies for the determination of chemical species of environmental interest were optimized and adapted. By means of the flame atomic absorption spectroscopy technique (FAAS) it was possible to sequentially quantify Fe, Mn, Cu, Cr, Ni, Pb, and Zn concentrations in sediment, soil and rock samples. Through the formation of colorful complexes of iron species, obtained under specific and well-defined reaction conditions, and their subsequent quantification by visible spectroscopy with independent methodologies, it was possible to determine the total iron, Fe2+ and Fe3+ content in mine leachates. The methodologies described turned out to be precise and accurate, they are free of matrix interferences and are comparable with other validated methodologies. The linearity intervals in FAAS for the seven elements vary from 0.05 to 16 mg/L, with detection limits between 0.03 and 0.2 mg/L. With respect to the colorimetric determinations of total Fe, Fe2+ and Fe3+ in samples of sulfided mining leachates, linear ranges of concentration comprised between 0.05 and 17.5 mg/L were observed. The detection limits obtained were 0.05 mg/L for total Fe and Fe2+ and 0.14 mg/L for Fe3+.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[espectroscopia analítica]]></kwd>
<kwd lng="es"><![CDATA[adecuabilidad de métodos]]></kwd>
<kwd lng="es"><![CDATA[rocas]]></kwd>
<kwd lng="es"><![CDATA[suelos]]></kwd>
<kwd lng="es"><![CDATA[sedimentos]]></kwd>
<kwd lng="es"><![CDATA[lixiviados de mina]]></kwd>
<kwd lng="en"><![CDATA[analytical spectroscopy]]></kwd>
<kwd lng="en"><![CDATA[suitability of methods]]></kwd>
<kwd lng="en"><![CDATA[rocks]]></kwd>
<kwd lng="en"><![CDATA[soils]]></kwd>
<kwd lng="en"><![CDATA[sediments]]></kwd>
<kwd lng="en"><![CDATA[mine leached]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Arango]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Vélez]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Jaramillo]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Valencia]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Cuantificación de hierro ferroso en espinaca y harina fortificada: una aplicación para la industria de panificación]]></article-title>
<source><![CDATA[J. Eng. Technol.]]></source>
<year>2012</year>
<volume>1</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>18-25</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ata]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Hamid]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Ahmed]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Hamid]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Ahmed]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Wadood]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A method optimization study for atomic absorption spectrophotometric determination of total zinc in insulin using direct aspiration technique]]></article-title>
<source><![CDATA[Alexandria J. Med.]]></source>
<year>2015</year>
<volume>51</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>19-23</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Balasubramanian]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Pugalenthi]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Determination of total chromium in tannery wastewater by inductively coupled plasma-atomic emission spectrometry, flame atomic absorption spectrometry and UV-visible spectrophotometric methods]]></article-title>
<source><![CDATA[Talanta]]></source>
<year>1999</year>
<volume>50</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>457-67</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Brouwer]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Teoría de FRX]]></source>
<year>2013</year>
<edition>3a</edition>
<page-range>65</page-range><publisher-loc><![CDATA[Almelo, Holanda ]]></publisher-loc>
<publisher-name><![CDATA[PANalytical]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="book">
<collab>CCAyAC</collab>
<source><![CDATA[CCAyAC-P-058. Criterios para la validación de métodos fisicoquímicos. Guía técnica]]></source>
<year>2011</year>
<page-range>20</page-range><publisher-loc><![CDATA[Ciudad de México, México ]]></publisher-loc>
<publisher-name><![CDATA[Comisión de Control Analítico y Ampliación de Cobertura]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="book">
<collab>CENAM-EMA</collab>
<source><![CDATA[Guía técnica sobre trazabilidad e incertidumbre en las mediciones analíticas que emplean la técnica de espectrofotometría de ultravioleta-visible. Guía técnica]]></source>
<year>2008</year>
<page-range>69</page-range><publisher-loc><![CDATA[Querétaro, México ]]></publisher-loc>
<publisher-name><![CDATA[Centro Nacional de Metrología-Entidad Mexicana de Acreditación]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Charlot]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Colorimetric determination of element (principles and methods)]]></source>
<year>1964</year>
<page-range>449</page-range><publisher-loc><![CDATA[Nueva York, EUA ]]></publisher-loc>
<publisher-name><![CDATA[Elsevier]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chen]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Teo]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Determination of cadmium, copper, lead and zinc in water samples by flame atomic absorption spectrometry after cloud point extraction]]></article-title>
<source><![CDATA[Anal. Chim. Acta.]]></source>
<year>2001</year>
<volume>450</volume>
<page-range>215-22</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Christian]]></surname>
<given-names><![CDATA[G.D.]]></given-names>
</name>
</person-group>
<source><![CDATA[Química analítica]]></source>
<year>2009</year>
<page-range>828</page-range><publisher-loc><![CDATA[Ciudad de México, México ]]></publisher-loc>
<publisher-name><![CDATA[McGraw Hill]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cravotta]]></surname>
<given-names><![CDATA[C.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Trahan]]></surname>
<given-names><![CDATA[M.K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Limestone drains to increase pH and remove dissolved metals from acidic mine drainage]]></article-title>
<source><![CDATA[Appl. Geochem.]]></source>
<year>1999</year>
<volume>14</volume>
<page-range>581-606</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gao]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Bai]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Xiao]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Jiang]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Levels, sources and risk assessment of trace elements in wetland soils of a typical shallow freshwater lake, China]]></article-title>
<source><![CDATA[Stoch. Env. Res. Risk A.]]></source>
<year>2013</year>
<volume>27</volume>
<page-range>275-84</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gómez-Nieto]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Gismera]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Sevilla]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Procopio]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Fast sequential multi-element determination of major and minor elements in environmental samples and drinking waters by high-resolution continuum source flame atomic absorption spectrometry]]></article-title>
<source><![CDATA[Anal. Chim. Acta.]]></source>
<year>2015</year>
<volume>854</volume>
<page-range>13-9</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gray]]></surname>
<given-names><![CDATA[N.F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Environmental impact and remediation of acid mine drainage: a management problem]]></article-title>
<source><![CDATA[Environ. Geol.]]></source>
<year>1997</year>
<volume>30</volume>
<numero>1-2</numero>
<issue>1-2</issue>
<page-range>62-71</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Harris]]></surname>
<given-names><![CDATA[D.C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Análisis químico cuantitativo]]></source>
<year>2013</year>
<edition>3a</edition>
<page-range>774</page-range><publisher-loc><![CDATA[Barcelona, España ]]></publisher-loc>
<publisher-name><![CDATA[Reverté]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Harvey]]></surname>
<given-names><![CDATA[A.E.]]></given-names>
</name>
<name>
<surname><![CDATA[Smart]]></surname>
<given-names><![CDATA[J.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Amis]]></surname>
<given-names><![CDATA[E.S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Simultaneous spectrophotometric determination of Iron (II) and total Iron with 1,10-phenanthroline]]></article-title>
<source><![CDATA[Anal. Chem.]]></source>
<year>1955</year>
<volume>27</volume>
<page-range>26-9</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jennings]]></surname>
<given-names><![CDATA[S.R.]]></given-names>
</name>
<name>
<surname><![CDATA[Dollhopf]]></surname>
<given-names><![CDATA[D.J.]]></given-names>
</name>
<name>
<surname><![CDATA[Inskeep]]></surname>
<given-names><![CDATA[W.P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Acid production from sulfide minerals using hydrogen peroxide weathering]]></article-title>
<source><![CDATA[Appl. Geochem.]]></source>
<year>2000</year>
<volume>15</volume>
<page-range>247-55</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jimeno]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Metodología de análisis químico de escorias del proceso de obtención de oro y plata Merrill-Crowe utilizando espectroscopia de emisión atómica con plasma acoplado inductivamente (ICP-OES)]]></source>
<year>2017</year>
<page-range>91</page-range><publisher-loc><![CDATA[Ciudad de México, México ]]></publisher-loc>
<publisher-name><![CDATA[Facultad de Química, Universidad Nacional Autónoma de México]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lozano]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Bernal]]></surname>
<given-names><![CDATA[J.P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Characterization of a new set of eight geochemical reference materials for XRF, major and trace element analysis]]></article-title>
<source><![CDATA[Rev. Mex. Cienc. Geo.]]></source>
<year>2005</year>
<volume>22</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>329-44</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Magnusson]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Örnemark]]></surname>
<given-names><![CDATA[U.]]></given-names>
</name>
</person-group>
<source><![CDATA[Eurachem guide: The fitness for purpose of analytical methods - A laboratory guide to method validation and related topics]]></source>
<year>2014</year>
<edition>2a</edition>
<page-range>62</page-range><publisher-name><![CDATA[Eurachem]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Miller]]></surname>
<given-names><![CDATA[J.N.]]></given-names>
</name>
<name>
<surname><![CDATA[Miller]]></surname>
<given-names><![CDATA[J.C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Estadística y quimiometría para química analítica]]></source>
<year>2002</year>
<edition>4a</edition>
<page-range>278</page-range><publisher-loc><![CDATA[Madrid, España ]]></publisher-loc>
<publisher-name><![CDATA[Prentice Hall]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Potts]]></surname>
<given-names><![CDATA[P.J.]]></given-names>
</name>
<name>
<surname><![CDATA[Tindle]]></surname>
<given-names><![CDATA[A.G.]]></given-names>
</name>
<name>
<surname><![CDATA[Webb]]></surname>
<given-names><![CDATA[P.C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Geochemical reference material compositions]]></source>
<year>1992</year>
<page-range>313</page-range><publisher-loc><![CDATA[Boca Raton, Florida, EUA ]]></publisher-loc>
<publisher-name><![CDATA[CRC Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sastre]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Vidal]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Rauret]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Determination of Cd, Cu, Pb and Zn in environmental samples: Microwave assisted total digestion versus aqua regia and nitric acid extraction]]></article-title>
<source><![CDATA[Anal. Chim. Acta.]]></source>
<year>2002</year>
<volume>462</volume>
<page-range>59-72</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Singh]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<name>
<surname><![CDATA[Agrawal]]></surname>
<given-names><![CDATA[H.M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Qualitative soil mineral analysis by EDXRF, XRD and AAS probes]]></article-title>
<source><![CDATA[Radiat. Phys. Chem.]]></source>
<year>2012</year>
<volume>81</volume>
<page-range>1796-803</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Skoog]]></surname>
<given-names><![CDATA[D.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Holler]]></surname>
<given-names><![CDATA[M.J.]]></given-names>
</name>
<name>
<surname><![CDATA[Nieman]]></surname>
<given-names><![CDATA[T.A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Principios de análisis instrumental]]></source>
<year>2001</year>
<edition>5a</edition>
<page-range>1024</page-range><publisher-loc><![CDATA[Madrid, España ]]></publisher-loc>
<publisher-name><![CDATA[McGraw-Hill]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Soodan]]></surname>
<given-names><![CDATA[R.K.]]></given-names>
</name>
<name>
<surname><![CDATA[Pakade]]></surname>
<given-names><![CDATA[Y.B.]]></given-names>
</name>
<name>
<surname><![CDATA[Nagpal]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Katnoria]]></surname>
<given-names><![CDATA[J.K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Analytical techniques for estimation of heavy metals in soil ecosystem: A tabulated review]]></article-title>
<source><![CDATA[Talanta]]></source>
<year>2014</year>
<volume>125</volume>
<page-range>405-10</page-range></nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Soylak]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Tuzen]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Santos]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Andrade]]></surname>
<given-names><![CDATA[M.G.]]></given-names>
</name>
<name>
<surname><![CDATA[Costa]]></surname>
<given-names><![CDATA[S.L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Optimization of microwave assisted digestion procedure for the determination of zinc, copper and nickel in tea samples employing flame atomic absorption spectrometry]]></article-title>
<source><![CDATA[J. Hazard. Mater.]]></source>
<year>2007</year>
<volume>149</volume>
<page-range>264-8</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Taverniers]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[de Loose]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[van Bockstaele]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Trends in quality in the analytical laboratory. II. Analytical method validation and quality assurance]]></article-title>
<source><![CDATA[TrAC-Trend. Anal. Chem.]]></source>
<year>2004</year>
<volume>23</volume>
<page-range>535-52</page-range></nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="book">
<collab>USEPA</collab>
<source><![CDATA[Test Method 3050B. Acid digestion of sediments, sludges, and soils]]></source>
<year>1996</year>
<publisher-name><![CDATA[United States Environmental Protection Agency]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="book">
<collab>USEPA</collab>
<source><![CDATA[Test Method 3052. Microwave assisted acid digestion of siliceous and organically based matrices]]></source>
<year>1996</year>
<publisher-name><![CDATA[United States Environmental Protection Agency]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Walpole]]></surname>
<given-names><![CDATA[R.E.]]></given-names>
</name>
<name>
<surname><![CDATA[Myers]]></surname>
<given-names><![CDATA[R.H.]]></given-names>
</name>
<name>
<surname><![CDATA[Myers]]></surname>
<given-names><![CDATA[S.L.]]></given-names>
</name>
<name>
<surname><![CDATA[Ye]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
</person-group>
<source><![CDATA[Probabilidad y estadística para ingeniería y ciencias]]></source>
<year>2012</year>
<edition>9a</edition>
<page-range>816</page-range><publisher-loc><![CDATA[Ciudad de México, México ]]></publisher-loc>
<publisher-name><![CDATA[Pearson Educación]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Walton]]></surname>
<given-names><![CDATA[H.F.]]></given-names>
</name>
<name>
<surname><![CDATA[Reyes]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Análisis químico e instrumental moderno]]></source>
<year>1983</year>
<page-range>410</page-range><publisher-loc><![CDATA[Barcelona, España ]]></publisher-loc>
<publisher-name><![CDATA[Reverté]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wood]]></surname>
<given-names><![CDATA[J.T.]]></given-names>
</name>
<name>
<surname><![CDATA[Mellon]]></surname>
<given-names><![CDATA[M.G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Thiocyanate method for Iron. A spectrophotometric study]]></article-title>
<source><![CDATA[Ind. Eng. Chem. Anal. Ed.]]></source>
<year>1941</year>
<volume>13</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>551-4</page-range></nlm-citation>
</ref>
<ref id="B33">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zamora]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<source><![CDATA[Evaluación del riesgo asociado a jales mineros. Comportamiento de metales pesados y arsénico]]></source>
<year>2003</year>
<page-range>152</page-range><publisher-loc><![CDATA[Ciudad de México, México ]]></publisher-loc>
<publisher-name><![CDATA[Facultad de Química, Universidad Nacional Autónoma de México]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
