<?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>2215-3470</journal-id>
<journal-title><![CDATA[Uniciencia]]></journal-title>
<abbrev-journal-title><![CDATA[Uniciencia]]></abbrev-journal-title>
<issn>2215-3470</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional, Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2215-34702024000100502</article-id>
<article-id pub-id-type="doi">10.15359/ru.38-1.27</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Validación de un método de cromatografía líquida (HPLC-UV/Vis) para la cuantificación de aldehídos en agua de lluvia y aire]]></article-title>
<article-title xml:lang="en"><![CDATA[Validation of a liquid chromatography method (HPLC-UV/Vis) to quantify aldehydes in rainwater and air]]></article-title>
<article-title xml:lang="pt"><![CDATA[Validação de um método de cromatografia líquida (HPLC-UV/Vis) para a quantificação de aldeídos em águas pluviais e atmosféricas]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Araya Araya]]></surname>
<given-names><![CDATA[Melissa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sibaja Brenes]]></surname>
<given-names><![CDATA[José Pablo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Soto Fallas]]></surname>
<given-names><![CDATA[Roy]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mora-Barrantes]]></surname>
<given-names><![CDATA[José Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alfaro Solís]]></surname>
<given-names><![CDATA[Rosa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Borbón-Alpízar]]></surname>
<given-names><![CDATA[Henry]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valdés González]]></surname>
<given-names><![CDATA[Juan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Escuela de Química Laboratorio de Química de la Atmósfera]]></institution>
<addr-line><![CDATA[Heredia ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Escuela de Química Laboratorio de Química de la Atmósfera]]></institution>
<addr-line><![CDATA[Heredia ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional Escuela de Química Laboratorio de Productos Naturales y Ensayos Biológicos]]></institution>
<addr-line><![CDATA[Heredia ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Nacional Escuela de Química Laboratorio de Química de la Atmósfera]]></institution>
<addr-line><![CDATA[Heredia ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad Nacional Escuela de Química Laboratorio de Química de la Atmósfera]]></institution>
<addr-line><![CDATA[Heredia ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Universidad Nacional Escuela de Química Laboratorio de Química de la Atmósfera]]></institution>
<addr-line><![CDATA[Heredia ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af7">
<institution><![CDATA[,Universidad Nacional Escuela de Química Laboratorio de Química de la Atmósfera]]></institution>
<addr-line><![CDATA[Heredia ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<volume>38</volume>
<numero>1</numero>
<fpage>502</fpage>
<lpage>516</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S2215-34702024000100502&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S2215-34702024000100502&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S2215-34702024000100502&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Los aldehídos son compuestos presentes en la atmósfera que se forman por la degradación fotoquímica de otros compuestos orgánicos en la tropósfera, estos pueden ser emitidos por fuentes naturales o antropogénicas.  (Objetivo)  En el presente trabajo se implementó un método analítico para la cuantificación de muestras de aldehídos en matrices como aire y agua de lluvia.  (Metodología)  El muestreo y el análisis de los aldehídos utilizó la metodología TO-11 de la Agencia de Protección Ambiental de los Estados Unidos (EPA). El muestreo se realizó mediante el uso de cartuchos de adsorción recubiertos con una disolución de 2,4-DNFH, formando una hidrazona con los aldehídos presentes en el agua de lluvia y en el aire. Estos fueron analizados mediante un cromatógrafo de líquido acoplado a un detector UV-Visible (HPLC-UV/Vis). Para la validación de la técnica de análisis y la calidad analítica de los resultados se determinaron: linealidad, sensibilidad, límites de cuantificación, límites de detección, repetibilidad, reproducibilidad y porcentaje de recuperación. En el caso de la repetibilidad, se utilizó la comparación del coeficiente de variación de Horwitz con los porcentajes de desviación estándar relativo (% DER) de las muestras.  (Resultados)  Los límites de detección obtenidos oscilan entre 0,18 &#956;g/m3 para el acetaldehído y 3,20 &#956;g/m3 en el caso de la acroleína, mientras que los límites de cuantificación están entre 0,62 &#956;g/m3 para el acetaldehído y 4,70 &#956;g/m3 para el heptanal; datos que garantizan la calidad analítica del método.  (Conclusiones)  En general, el método de análisis para los aldehídos mostró una buena correlación lineal, con valores de R2 igual o mayores a 0,9991 para cada curva de calibración, y valores de porcentajes de desvío relativo menores al 2,25 %, lo cual indica una buena precisión en el análisis.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Aldehydes are compounds in the atmosphere formed by the photochemical degradation of other organic compounds in the troposphere and can be emitted by natural or anthropogenic sources.  (Objective)  An analytical method was implemented to quantify aldehyde samples in matrices such as air and rainwater.  (Methodology)  Aldehyde sampling and analysis were conducted using method TO-11 from the United tates Environmental Protection Agency (EPA). Sampling was carried out by using adsorption cartridges coated with a 2,4-DNPH solution, forming a hydrazone with the aldehydes present in the rainwater and the air, which were tested using a liquid chromatograph coupled to a UV-visible detector (HPLC-UV/Vis). To validate the analysis technique and the analytical quality of the results, the following was determined: linearity, sensitivity, quantification limits, detection limits, repeatability, reproducibility, and recovery percentage. In the case of repeatability, the comparison of the Horwitz coefficient of variation was used with the percentages of relative standard deviation% RSD) of the samples.  (Results)  The detection and quantification limits obtained range between 0.18 &#956;g/m3 and 3.20 &#956;g/m3 for acetaldehyde and acrolein, respectively, while quantification limits are between 0.62 &#956;g/m3 for acetaldehyde and 4.70 &#956;g/m3 for heptanal, data that characterizes the method&#8217;s analytical quality.  (Conclusions)  In general, the analysis method for aldehydes showed linearity, with R2 values equal to or greater than 0.9991 for each calibration curve, and relative deviation percentage values less than 2.25 %, indicating good precision in the analysis.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo Os aldeídos são compostos presentes na atmosfera que são formados pela degradação fotoquímica de outros compostos orgânicos na troposfera, estes podem ser emitidos por fontes naturais ou antrópicas.  (Objetivo)  no presente trabalho, foi implementado um método analítico para a quantificação de amostras de aldeído em matrizes como ar e água da chuva.  (Metodologia)  A amostragem e a análise de aldeído usaram a metodologia TO-11 da Agência de Proteção Ambiental dos Estados Unidos (EPA). As amostragens foram realizadas utilizando cartuchos de adsorção revestidos com uma solução de 2,4-DNFH, formando uma hidrazona com os aldeídos presentes na água da chuva e no ar. Elas foram analisadas usando um cromatógrafo líquido acoplado a um detector UV-Visível (HPLC-UV/Vis). Para a validação da técnica de análise e da qualidade analítica dos resultados, foram determinados: linearidade, sensibilidade, limites de quantificação, limites de detecção, repetibilidade, reprodutibilidade e porcentagem de recuperação. No caso da repetibilidade, foi utilizada a comparação do coeficiente de variação de Horwitz com os percentuais de desvio padrão relativo (% DER) das amostras.  (Resultados)  Os limites de detecção obtidos variam de 0,18 &#956;g/m3 para acetaldeído e 3,20 &#956;g/m3 no caso da acroleína, enquanto os limites de quantificação estão entre 0,62 &#956;g/m3 para acetaldeído e 4,70 &#956;g/m3 para o heptanal; dados que garantem a qualidade analítica do método.  (Conclusões)  De forma geral, o método de análise para aldeídos apresentou uma boa correlação linear, com valores de R2 igual ou superior a 0,9991 para cada curva de calibração, e valores percentuais de desvio relativo inferiores a 2,25%, o que indica boa acurácia na análise.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[aldehídos]]></kwd>
<kwd lng="es"><![CDATA[agua de lluvia]]></kwd>
<kwd lng="es"><![CDATA[cromatografía]]></kwd>
<kwd lng="es"><![CDATA[validación]]></kwd>
<kwd lng="es"><![CDATA[límites de detección]]></kwd>
<kwd lng="es"><![CDATA[límites de cuantificación.]]></kwd>
<kwd lng="en"><![CDATA[Aldehydes]]></kwd>
<kwd lng="en"><![CDATA[rainwater]]></kwd>
<kwd lng="en"><![CDATA[chromatography]]></kwd>
<kwd lng="en"><![CDATA[dation]]></kwd>
<kwd lng="en"><![CDATA[detection limits]]></kwd>
<kwd lng="en"><![CDATA[quantification limits.]]></kwd>
<kwd lng="pt"><![CDATA[aldeídos]]></kwd>
<kwd lng="pt"><![CDATA[chuva]]></kwd>
<kwd lng="pt"><![CDATA[cromatografia]]></kwd>
<kwd lng="pt"><![CDATA[validação]]></kwd>
<kwd lng="pt"><![CDATA[limites de detecção]]></kwd>
<kwd lng="pt"><![CDATA[limites de quantificação.]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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