<?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>2224-6185</journal-id>
<journal-title><![CDATA[Tecnología Química]]></journal-title>
<abbrev-journal-title><![CDATA[RTQ]]></abbrev-journal-title>
<issn>2224-6185</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Oriente]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2224-61852019000300619</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Cafeína y barrido UV-Vis y el índice de calidad de agua en la microcuenca altoandina del río Chumbao, Andahuaylas, Apurímac, Perú]]></article-title>
<article-title xml:lang="en"><![CDATA[Caffeine and UV-Vis scanning and the water quality index in the high-Andean watershed of the Chumbao River, Andahuaylas, Apurímac, Perú]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Choque-Quispe]]></surname>
<given-names><![CDATA[David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ligarda-Samanez]]></surname>
<given-names><![CDATA[Carlos A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramos-Pacheco]]></surname>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Solano-Reynoso]]></surname>
<given-names><![CDATA[Aydeé M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quispe-Quispe]]></surname>
<given-names><![CDATA[Yadyra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional José María Arguedas E.P. Ingeniería Agroindustrial ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Peru</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Tecnológica de los Andes E.P. Ingeniería Ambiental ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Peru</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Alas Peruanas E.P. Ingeniería Ambiental ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Peru</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>39</volume>
<numero>3</numero>
<fpage>619</fpage>
<lpage>637</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2224-61852019000300619&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2224-61852019000300619&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2224-61852019000300619&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Las fuentes de agua superficial son recursos para las actividades socioeconómicas, sin embargo estas causan alteración y deterioro, este impacto es medido por el índice de calidad del agua (ICA) y recientemente por contaminantes emergentes. El objetivo fue evaluar el nivel de cafeína y el ICA, en la micro cuenca altoandina del rio Chumbao, situada entre 73°38' - 73°11'O y 13°49' - 13°34'S, de 4 800 a 2 000 msnm y área 767,4 km2. Se evaluó el ICA según la NSF y Dinius considerando parámetros: Nivel de oxigeno (OD y DBO5), Nivel de eutrofización (NO3- y PO4-), Características físicas (Temperatura, Turbidez, Color y TDS), Sustancias disueltas (Alcalinidad, Dureza, pH, Conductividad y Cloruros), Aspectos de salud (E. coli y Coliformes); la cafeína se determinó por la cromatografía líquida de alta eficacia (HPLC); el muestreo fue en temporada de avenidas, en 02 puntos lénticos y 08 lóticos. Se encontró que el uso predominante del agua es para agricultura, pastura y urbanización; la microcuenca presenta pendientes de 5,4% (18,3 km), 2,2% (11,8 km) y 4,3% (5,6 km), los parámetros muestran correlación R  s positiva (p-value &lt; 0,05), superando los estándares de calidad para vida acuática en los puntos urbanizados. No se detectó niveles de cafeína (n.d.&gt;1,09 &#956;g/L). El ICA según NSF y Dinius muestra dos categorías Buena y Muy mala para puntos lóticos; y excelente para las lagunas de la cabecera de cuenca, estas características se evidenciaron por un barrido UV-Vis de 200 a 700 nm.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The Surface of water sources are resources for socioeconomic activities, however these cause alteration and deterioration, this impact is measured by the water quality index (IQA) and recently by emerging pollutants. The objective was to evaluate the level of caffeine and IQA, in the high Andean watershed of the Chumbao River, located between 73 ° 38 '- 73 ° 11'O and 13 ° 49' - 13 ° 34'S, from 4 800 to 2 000 meters above sea level and area 767.4 km2. The IQA was evaluated in accordance with the NSF and Dinius, considering parameters: Oxygen level (OD and BOD5), Level of eutrophication (NO3- and PO4-), Physical characteristics (Temperature, Turbidity, Color and TDS), Dissolved substances (Alkalinity, Hardness, pH, Conductivity and Chlorides), Health aspects (E. Coli and Coliforms); the caffeine HPLC was determined; the sampling was in season of avenues, in 02 lentic points and 08 lotic. It was found that the predominant use of water is for agriculture, pasture and urbanization; the watershed presents slopes of 5.4% (18.3 km), 2.2% (11.8 km) and 4.3% (5.6 km), the parameters show positive correlation Rs (p-value &lt;0, 05), exceeding the quality standards for aquatic life in urbanized points. No caffeine levels were detected (n.d.&gt; 1.09 &#956;g / L). The IQA NSF and Dinius show two categories Good and Very bad for lotic points; and excellent for the lagoons of the basin head, these characteristics were evidenced by a UV-Vis sweep of 200 to 700 nm.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Índice de calidad de agua]]></kwd>
<kwd lng="es"><![CDATA[Cafeína]]></kwd>
<kwd lng="es"><![CDATA[barrido UV-Vis]]></kwd>
<kwd lng="en"><![CDATA[Water quality index]]></kwd>
<kwd lng="en"><![CDATA[Caffeine]]></kwd>
<kwd lng="en"><![CDATA[UV-Vis sweep]]></kwd>
</kwd-group>
</article-meta>
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