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https://repositorio.ufba.br/handle/ri/12397
metadata.dc.type: | Artigo de Periódico |
Título : | A pre-concentration procedure using coprecipitation for determination of lead and iron in several samples using flame atomic absorption spectrometry |
Otros títulos : | Analytica Chimica Acta |
Autor : | Ferreira, Sergio Luis Costa Saracoglu, S. Soylak, Mustafa Peker, D. S. Kacar Elci, L. Santos, Walter Nei Lopes dos Lemos, Valfredo Azevedo |
metadata.dc.creator: | Ferreira, Sergio Luis Costa Saracoglu, S. Soylak, Mustafa Peker, D. S. Kacar Elci, L. Santos, Walter Nei Lopes dos Lemos, Valfredo Azevedo |
Resumen : | The present paper proposes a pre-concentration procedure for determination of lead and iron in several samples by flame atomic absorption spectrometry. In it, lead(II) and iron(III) ions are coprecipitated using the violuric acid–copper(II) system as collector. Afterwards, the precipitate is dissolved with 1 M HNO3 solution and the metal ions are determined. The optimization step was performed using factorial design involving the variables: pH, violuric acid mass (VA) and copper concentration (Cu). Using the optimized experimental conditions, the proposed procedure allows the determination these metals with detection limits of 0.18 μg L−1 for iron and 0.16 μg L−1 for lead. The effects of foreign ions on the pre-concentration procedure were also evaluated and the results demonstrated that this method could be applied for determination of iron and lead in several real samples. The proposed method was successfully applied to the analysis of seawater, urine, mineral water, soil and physiological solution samples. The concentrations of lead and iron achieved in these samples agree well with others data reported in the literature. |
Palabras clave : | Pre-concentration Coprecipitation ron Lead Factorial design |
URI : | http://www.repositorio.ufba.br/ri/handle/ri/12397 |
Fecha de publicación : | 2006 |
Aparece en las colecciones: | Artigo Publicado em Periódico (Química) |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
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1-s2.0-S0003267006011421-main.pdf Restricted Access | 162,08 kB | Adobe PDF | Visualizar/Abrir Request a copy |
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