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Título : Electrochemical generation of arsenic volatile species using a gold mercury amalgaman cathode. Determination of arsenic by atomic absorption spectrometry.
Autor : Romero Bonilla, Hugo
Palabras clave : ANALYTICAL CHEMISTRY RESEARCH
GENERACION DE HIDRURO DE ARSENICO ELECTROQUIMICA
ESPECTROMETRIA DE ABSORCION ATOMICA
MUESTRAS DE AGUA DE GRIFO
Fecha de publicación : 2015
Editorial : Netherlands
Citación : Romero Bonilla, H. (2015) Electrochemical generation of arsenic volatile species using a gold mercury amalgaman cathode. Determination of arsenic by atomic absorption spectrometry. Analytical Chemistry Research.
Resumen : The electrochemical generation of arsenic volatile species (arsine) using an Au/Hg amalgam cathode in a 0.5 M H2SO4 solution, is described. Results were compared with those obtained with other cathodes commonly used for generation of arsine. The effects of the electrolytic conditions and interferent ions have been studied. Results show that the Au/Hg cathode has better tolerance to interference and higher repeatability than cathodes made out of platinum (Pt), gold (Au), reticulated glassy carbon (RGC), lead (Pb). Under optimized conditions, a 0.027 μg L−1 (3σ) detection limit for As(III) in aqueous solutions and a 2.4% relative standard deviation for a 0.1 μg L−1 As(III) were obtained. The accuracy of the method was verified by determination of As in a certified reference material. The proposed method was applied to the determination of As in spiked tap water samples.
URI : http://repositorio.utmachala.edu.ec/handle/48000/6527
ISSN : 0212-7237
Otros identificadores : Analytical Chemistry Research
Aparece en las colecciones: Artículos Científicos Scopus



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