<?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>2224-5421</journal-id>
<journal-title><![CDATA[Revista Cubana de Química]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Cub Quim]]></abbrev-journal-title>
<issn>2224-5421</issn>
<publisher>
<publisher-name><![CDATA[Ediciones UO, Universidad de Oriente]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2224-54212019000300498</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Verificación de la determinación de ortofosfatos en el digestato de residuales porcinos de la provincia de Sancti Spíritus]]></article-title>
<article-title xml:lang="en"><![CDATA[Verification of the determination of orthophosphates in the digestate of swine residuals in Sancti Spíritus province]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Odales-Bernal]]></surname>
<given-names><![CDATA[Leyanet]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Duharte-Rodríguez]]></surname>
<given-names><![CDATA[Wendy Lucía]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Sancti Spíritus &#8220;José Martí Pérez&#8221; Centro de Estudios de Energía y Procesos Industriales ]]></institution>
<addr-line><![CDATA[Sancti Spíritus ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<volume>31</volume>
<numero>3</numero>
<fpage>498</fpage>
<lpage>510</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2224-54212019000300498&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2224-54212019000300498&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2224-54212019000300498&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El residual resultante de la digestión anaerobia (digestato) es considerado un valioso abono orgánico por ser rico en nutrientes esenciales, para el crecimiento y desarrollo de las plantas. El presente trabajo fue realizado en el Laboratorio de biogás e ingeniería ambiental de la Universidad de Sancti Spíritus, con el objetivo de verificar el desempeño del método espectrofotométrico de determinación de ortofosfatos, en las fracciones sólida y líquida del digestato, generado a partir del biodigestor tipo Chino y residuales porcinos de la provincia de Sancti Spíritus, Cuba. Para la evaluación del método se determinaron los parámetros: precisión en términos de repetitividad y reproducibilidad intermedia y la veracidad. Se demostró que el método es preciso y veraz en todo el rango de concentraciones de la técnica analítica (2 a 18 ppm). Las fracciones sólida y líquida contienen fósforo en forma de iones ortofosfatos, por lo que puede utilizarse como fertilizante.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The residual resulting from anaerobic digestion (digestate), is considered a valuable organic fertilizer because it is rich in essential nutrients for the growth and development of plants. The present work was carried out in the Laboratory of biogas and environmental engineering of the University of Sancti Spíritus with the objective of verifying the performance of the spectrophotometric method of determination of orthophosphates in the solid and liquid fractions of the digestate generated from the Chinese-type biodigestor and residual pigs from the Sancti Spíritus province, Cuba. For the evaluation of the method, the following parameters were determined: precision in terms of repeatability and intermediate reproducibility and accuracy. It was demonstrated that the method is accurate and truthful in the entire range of concentrations of the analytical technique (2 to 18 ppm). The solid and liquid fractions contain phosphorus in the form of orthophosphate ions, so it can be used as a fertilizer.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[digestión anaerobia]]></kwd>
<kwd lng="es"><![CDATA[digestato]]></kwd>
<kwd lng="es"><![CDATA[ortofosfato]]></kwd>
<kwd lng="es"><![CDATA[fertilizante]]></kwd>
<kwd lng="es"><![CDATA[verificación]]></kwd>
<kwd lng="en"><![CDATA[anaerobic digestion]]></kwd>
<kwd lng="en"><![CDATA[digestate]]></kwd>
<kwd lng="en"><![CDATA[orthophosphate]]></kwd>
<kwd lng="en"><![CDATA[fertilizer]]></kwd>
<kwd lng="en"><![CDATA[verification]]></kwd>
</kwd-group>
</article-meta>
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