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Veuillez utiliser cette adresse pour citer ce document :
http://hdl.handle.net/1834/3855
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| Titre: | Decoloración de alginato de sodio extraído de las algas pardas marinas del género sargassum con el uso de peróxido de hidrógeno |
| Autre(s) titre(s): | Bleaching of sodium alginate from the brown seaweeds sargassum with hydrogen peroxide. |
| Auteur(s): | Regalado, E.L.
Laguna, A.
Torres, M.
Sabatier, J.D.
Hernández, M.
Ferrer, A.E.
Nogueiras, C. |
| mot-clé ASFA: | Bleaching |
| Date de publication: | 2007 |
| Référence bibliographique: | Quim. Nova, 30(1). p. 5-8 |
| Résumé: | Hydrogen peroxide bleaching of sodium alginate from seaweeds oh the Sargassum genus was studied. The influence of H2O2 concentration
(percentage of H2O2 on a dry weight alginate basis, w/w) and NaOH/H2O2 ratio (% NaOH/% H2O2, both referred to a dry weight alginate
basis, w/w) on the molecular weight, color removal and content of Fe3+ ions of bleached alginate samples was investigated by UV and
IR spectroscopies, colorimetric determination of Fe3+ ions and vapor pressure osmometry. Higher yield, purity and molecular weight of
alginate were obtained using 3% (or less) of hydrogen peroxide and a NaOH/H2O2 ratio of 1.2 for bleaching. |
| URI/URL: | http://hdl.handle.net/1834/3855 |
| URL d'une autre version: | http://www.scielo.br/pdf/qn/v30n1/01.pdf |
| Collection(s) : | 1. Articulos científicos
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