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Título: | Spectrofluorimetric determination of second critical micellar concentration of SDS and SDS/Brij 30 systems. |
Autor(es): | Romani, Ana Paula Machado, Antonio Eduardo da Hora Hioka, Noboru Severino, Divinomar Baptista, Mauricio da Silva Codognoto, Lúcia Magini, Maira Regina Rodrigues Oliveira, Hueder Paulo Moisés de |
Palavras-chave: | Fluorescence Dyes |
Data do documento: | 2009 |
Referência: | ROMANI, A. P. et al. Spectrofluorimetric determination of second critical micellar concentration of SDS and SDS/Brij 30 systems. Journal of Fluorescence, v. 19, n. 2, p. 327-332, 2009. Disponível em: <https://link.springer.com/article/10.1007%2Fs10895-008-0420-4>. Acesso em: 20 abr. 2017. |
Resumo: | Potentially useful stead-state fluorimetric technique was used to determine the critical micellar concentrations (CMC1 and CMC2) for two micellar media, one formed by SDS and the other by SDS/Brij 30. A comparative study based on conductimetric and surfacial tension measurements suggests that the CMC1 estimated by the fluorimetric method is lower than the value estimated by these other techniques. Equivalent values were observed for SDS micelles without Brij 30 neutral co-surfactant. The use of acridine orange as fluorescent probe permitted to determine both CMC1 and CMC2. Based on it an explanation on aspects of micelle formation mechanism is presented, particularly based on a spherical and a rod like structures. |
URI: | http://www.repositorio.ufop.br/handle/123456789/7760 |
Link para o artigo: | https://link.springer.com/article/10.1007%2Fs10895-008-0420-4 |
DOI: | https://doi.org/10.1007/s10895-008-0420-4 |
ISSN: | 1573-4994 |
Aparece nas coleções: | DEQUI - Trabalhos apresentados em eventos |
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ARTIGO_SpectrofluorimetricDeterminationSecond.pdf Restricted Access | 351,27 kB | Adobe PDF | Visualizar/Abrir |
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