Assessment of the application of cathodic stripping voltammetry to the analysis of diazo reactive dyes and their hydrolysis products
Nenhuma Miniatura disponível
Data
2001-09-01
Autores
Guaratini, CCI
Fogg, A. G.
Zanoni, Maria Valnice Boldrin [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Resumo
Two reactive dyes, C.I. Reactive Red 120 (RR120) and C.I. Reactive Green 19 (RG19), each bearing two azo groups as the chromophoric moiety and two monochloro-s-triazine groups as reactive groups, can be detected at nanomolar levels using cathodic stripping voltammetry. Linear calibration graphs were obtained for both reactive dyes, from 0.015 to 0.14 mu mol l(-1) for RR120 in pH 4 buffer and from 0.012 to 0.26 mu mol l(-1) for RG19 in pH 3 buffer, using a preconcentration at 0 V during 180 and 240 s on the mercury electrode, respectively. (C) 2001 Elsevier B.V. Ltd. All rights reserved.
Descrição
Palavras-chave
reactive dyes, cathodic stripping voltammetry, dye hydrolysis, dye determination
Como citar
Dyes and Pigments. Oxford: Elsevier B.V., v. 50, n. 3, p. 211-221, 2001.