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Veuillez utiliser cette adresse pour citer ce document : http://hdl.handle.net/1834/3855

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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