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https://repositorio.ufba.br/handle/ri/4895
metadata.dc.type: | Artigo de Periódico |
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 |
metadata.dc.creator: | Dantas, Alailson Falcão Costa, Antonio Celso Spinola Ferreira, Sergio Luis Costa |
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. |
Keywords: | Aluminium Spectrophotometry Tensoatives. |
URI: | http://www.repositorio.ufba.br/ri/handle/ri/4895 |
Issue Date: | 2000 |
Appears in Collections: | Artigo Publicado em Periódico (Química) |
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