Development and optimization of a digestion method for heavy metal determination in scleractinian corals by Atomic Absorption Spectrometry (AAS).

Development and optimization of a digestion method for heavy metal determination in scleractinian corals by Atomic Absorption Spectrometry (AAS).

In the last decade a great number of studies have been directed especially to the evaluation of the environmental impact of heavy metal concentration levels in coral barriers. Related to studies in scleractinian corals, many chemical techniques have been proposed to determine heavy metals but Atomic...

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Autores principales: Galindo-Riaño, MD, Castellón, L, González, K, García-Vargas, M
Formato: Online
Lenguaje:eng
Publicado: Iniversidad Autónoma de Baja California 2003
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/174
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spelling oai:cienciasmarinas.com.mx:article-1742019-04-24T18:31:27Z Development and optimization of a digestion method for heavy metal determination in scleractinian corals by Atomic Absorption Spectrometry (AAS). Desarrollo y optimización de un método de digestión para la determinación de metales pesados en corales escleractíneos por Espectrometría de Absorción Atómica (EAA) Galindo-Riaño, MD Castellón, L González, K García-Vargas, M sample pretreatment scleractinian coral heavy metal marine pollution pretratamiento de la muestra corales escleractíneos metales pesados contaminación marina In the last decade a great number of studies have been directed especially to the evaluation of the environmental impact of heavy metal concentration levels in coral barriers. Related to studies in scleractinian corals, many chemical techniques have been proposed to determine heavy metals but Atomic Absorption Spectrometry (AAS) is the most widely used; however, regarding sample pretreatment methods there is not a unique criterion on the requirements to obtain the precise and accurate results needed in this analysis. So, in this paper the application of several widely used pretreatment methods for digestion of corals and sediments were studied in which HNO3, HCl and HClO4 are used in different conditions (concentration, temperature, etc.), with the aim of comparing their efficiency. The method in which a combination of HNO3 and HClO4 was used resulted the most effective one. A 22 experimental design was carried out to study the influence of the HNO3 volume as well as to optimize the HNO3:HClO4 mixture. Finally the method was validated using reference certificate material (SOIL-7) using the NIST accuracy test and applying it in the analyses of different coral samples which produced results with appropriate analytical quality. En la última década un gran número de estudios se han enfocado especialmente a la evaluación del impacto ambiental de los niveles de concentración de metales pesados en las barreras coralinas. En relación al estudio de metales pesados en corales escleractíneos, la técnica de análisis más utilizada ha sido la Espectrometría de Absorción Atómica (EAA); sin embargo, en cuanto al pretratamiento químico de digestión de las muestras no existe un criterio único sobre el método más adecuado que proporcione los resultados con la precisión y exactitud requeridos en este tipo de análisis. Por ello en este trabajo se estudia la aplicación de algunos de los tratamientos más utilizados en la digestión de corales y sedimentos, mediante el empleo de HNO3, HCl y HClO4 en diferentes condiciones (concentración, temperatura, etc.) con objeto de comparar la eficacia de los mismos. El método de disolución de la muestra con HNO3 y HClO4 resultó ser el más adecuado. Para realizar la optimización de dicho tratamiento se realizó un diseño experimental 22 con el fin de estudiar la influencia del volumen de HNO3, así como el sinergismo de la mezcla HNO3:HClO4. Finalmente, el método fue validado con la utilización de material de referencia certificado (SOIL-7), utilizando el test de exactitud NIST que es aplicado al análisis de diferentes muestras de corales obteniendo resultados con la calidad analítica adecuada. Iniversidad Autónoma de Baja California 2003-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/174 10.7773/cm.v29i4.174 Ciencias Marinas; Vol. 29 No. 4 (2003); 413-424 Ciencias Marinas; Vol. 29 Núm. 4 (2003); 413-424 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/174/149
institution Ciencias Marinas
collection OJS
language eng
format Online
author Galindo-Riaño, MD
Castellón, L
González, K
García-Vargas, M
spellingShingle Galindo-Riaño, MD
Castellón, L
González, K
García-Vargas, M
Development and optimization of a digestion method for heavy metal determination in scleractinian corals by Atomic Absorption Spectrometry (AAS).
author_facet Galindo-Riaño, MD
Castellón, L
González, K
García-Vargas, M
author_sort Galindo-Riaño, MD
title Development and optimization of a digestion method for heavy metal determination in scleractinian corals by Atomic Absorption Spectrometry (AAS).
title_short Development and optimization of a digestion method for heavy metal determination in scleractinian corals by Atomic Absorption Spectrometry (AAS).
title_full Development and optimization of a digestion method for heavy metal determination in scleractinian corals by Atomic Absorption Spectrometry (AAS).
title_fullStr Development and optimization of a digestion method for heavy metal determination in scleractinian corals by Atomic Absorption Spectrometry (AAS).
title_full_unstemmed Development and optimization of a digestion method for heavy metal determination in scleractinian corals by Atomic Absorption Spectrometry (AAS).
title_sort development and optimization of a digestion method for heavy metal determination in scleractinian corals by atomic absorption spectrometry (aas).
description In the last decade a great number of studies have been directed especially to the evaluation of the environmental impact of heavy metal concentration levels in coral barriers. Related to studies in scleractinian corals, many chemical techniques have been proposed to determine heavy metals but Atomic Absorption Spectrometry (AAS) is the most widely used; however, regarding sample pretreatment methods there is not a unique criterion on the requirements to obtain the precise and accurate results needed in this analysis. So, in this paper the application of several widely used pretreatment methods for digestion of corals and sediments were studied in which HNO3, HCl and HClO4 are used in different conditions (concentration, temperature, etc.), with the aim of comparing their efficiency. The method in which a combination of HNO3 and HClO4 was used resulted the most effective one. A 22 experimental design was carried out to study the influence of the HNO3 volume as well as to optimize the HNO3:HClO4 mixture. Finally the method was validated using reference certificate material (SOIL-7) using the NIST accuracy test and applying it in the analyses of different coral samples which produced results with appropriate analytical quality.
publisher Iniversidad Autónoma de Baja California
publishDate 2003
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/174
_version_ 1715723939025518592

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