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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/4895

Title: Uso do violeta de alizarina N (AVN) como reagente espectrofotométrico na determinação de alumínio
Other Titles: Química Nova
Authors: Dantas, Alailson Falcão
Costa, Antonio Celso Spinola
Ferreira, Sergio Luis Costa
Keywords: Aluminium;Spectrophotometry;Tensoatives.
Issue Date: 2000
Abstract: Use of the alizarine violet N (AVN) as a spectrophotometric reagent for aluminium determination. The present work proposes the application of the 4-Hidroxy-3-(2-hydroxynaphtylazo)-benzenesulphonic acid (C.I. 15670), Alizarine Violet N (AVN), as a reagent for direct aluminium determination using molecular absorption spectrophotometry in the presence of tensoatives. Al(III) cation reacts with AVN in pH 9.4, forming a red complex, stable for at least 24 hours, with absorption minimum at 607nm and, against a reagent blank, (ecomplex - ereagent) = -2.71x104 L.mol-1.cm-1. The reaction occurs in the presence of a Triton-X100 and CTAB tensoatives mixture, in the presence of EDTA. Al(III) determination is possible in the linear range of 50 up to 400ng.mL-1, with a detection limit of 41 ng.mL-1.
Description: p. 155-160,Mar/Apr.
URI: http://www.repositorio.ufba.br/ri/handle/ri/4895
ISSN: 0100-4042
Appears in Collections:Artigos Publicados em Periódicos (Quimica)

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