<?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>2221-2442</journal-id>
<journal-title><![CDATA[Revista CENIC Ciencias Químicas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. CENIC Cienc. Quím.]]></abbrev-journal-title>
<issn>2221-2442</issn>
<publisher>
<publisher-name><![CDATA[Centro Nacional de Investigaciones Científicas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2221-24422020000100076</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Determinación de hidrocarburos del petróleo en matrices acuosas mediante el empleo de la espectroscopía infrarroja]]></article-title>
<article-title xml:lang="en"><![CDATA[Determination of petroleum hydrocarbons in aqueous matrices using infrared spectroscopy]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Comesaña García]]></surname>
<given-names><![CDATA[Yumirka]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aldana Jiménez]]></surname>
<given-names><![CDATA[Karelia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Núnez Clemente]]></surname>
<given-names><![CDATA[Ana C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres Ríos]]></surname>
<given-names><![CDATA[Belkis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro de Investigación del Petróleo  ]]></institution>
<addr-line><![CDATA[ La Habana]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<volume>51</volume>
<numero>1</numero>
<fpage>76</fpage>
<lpage>89</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2221-24422020000100076&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2221-24422020000100076&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2221-24422020000100076&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Los hidrocarburos totales de petróleo constituyen los agentes contaminantes del agua de mayor relevancia; pueden estar presentes en los sistemas de almacenamiento y las fuentes de abastecimiento subterráneas y superficiales debido a fugas, derrames, vertimientos y al deficiente manejo de residuos que contengan estos compuestos orgánicos. El objetivo de este trabajo es desarrollar un procedimiento analítico para cuantificar hidrocarburos en matrices acuosas mediante el empleo de la espectroscopía infrarroja de rango medio y tetracloroetileno como solvente de extracción. Se empleó la técnica de transmisión en celdas de cuarzo de 30 mm de espesor y se realizó la medición de la altura máxima de la señal en 2930 cm-1 correspondiente a la vibración de estiramiento C-H asimétrico de metilenos. El error medio de calibración y el límite de cuantificación fueron igual a 0,0002 mg/ml. Se obtuvieron recobrados de 77 y 84 % para los niveles de concentración 0,2640 y 0,5280 mg/l, respectivamente. El error global en las concentraciones fue 0,0001 mg/l y las desviaciones estándares relativas fueron inferiores al 5 %. El procedimiento propuesto es adecuado para el fin previsto en el intervalo de concentraciones de. 0,0002 a 0,0819 mg/ml.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Total petroleum hydrocarbons are among the most important water pollutants; they may be present in storage systems and underground and surface supply sources due to leaks, spills, dumping and / or poor waste management that these organic compounds contain. The objective of this work is to develop an analytical procedure to quantify hydrocarbons in aqueous matrices using mid-range infrared spectroscopy and tetrachloroethylene as an extraction solvent. The transmission technique was used in 30 mm thick quartz cells and the maximum height measurement in 2930 cm-1 corresponding to the asymmetric C-H stretching vibration of methylenes was performed. The mean calibration error and the limit of quantification were equal to 0,0002 mg / ml. Recoveries of 77 and 84% were obtained for concentration levels 0,2640 and 0,5280 mg/l, respectively. The global error in the concentrations was 0,0001 mg/l and the relative standard deviations were less than 5%. The proposed procedure is suitable for the intended purpose in the concentration range of. 0,0002 to 0,0819 mg / ml.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[hidrocarburos totales del petróleo]]></kwd>
<kwd lng="es"><![CDATA[espectroscopia infrarroja]]></kwd>
<kwd lng="es"><![CDATA[tetracloroetileno]]></kwd>
<kwd lng="en"><![CDATA[total petroleum hydrocarbons]]></kwd>
<kwd lng="en"><![CDATA[infrared spectroscopy]]></kwd>
<kwd lng="en"><![CDATA[tetrachloroethylene]]></kwd>
</kwd-group>
</article-meta>
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