Utilize este identificador para referenciar este registo: http://hdl.handle.net/10198/3206
Título: Colour and stability of pure anthocyanins influenced by pH including the alkaline region
Autor: Fossen, Torgils
Cabrita, Luís
Andersen, Øyvind M.
Palavras-chave: Anthocyanins
Colour stability
Data: 1998
Editora: Elsevier
Citação: Fossen, Torgils; Cabrita, Luis; Andersen, Øyvind M. (1998) - Colour and stability of pure anthocyanins influenced by pH including the alkaline region. Food Chemistry. ISSN 0308-8146. 63: 4, p. 435-440
Resumo: This study on anthocyanin colour variation (intensity, lambda max, absorptivity) over the pH range 1-9 during 60 days of storage, was conducted on petunidin 3-[6-O-(4-O-E-p- coumaroyl-O-alfa-L-rhamnopyranosyl)-beta-D-glucopyranoside]-5-O-beta-D-glucopyranoside (petanin) and cyanidin 3-O-beta-D-glucopyranoside (cy3glc) at 10 and 23ºC. Compared to cy3glc, petanin afforded higher colour intensity and higher or similar stability throughout the whole pH range. At pH 4.0, 84% of petanin was intact after 60 days storage at 10ºC, while the corresponding solution of cy3glc was totally degraded. At pH 8.1 the colour intensity of petanin was even higher than at the lowest pH values. The visible lambda max absorption of petanin after 5 days at pH 8.1 at 10ºC was similar or higher than the corresponding absorptions of the fresh solutions of cy3glc at any pH. The use of anthocyanins like petanin as food colorants in slightly alkaline products (bakery, milk, egg, etc.) should therefore be considered at least in products with limited storage time kept in a refrigerator.
Peer review: yes
URI: http://hdl.handle.net/10198/3206
ISSN: 0308-8146
Versão do Editor: http://www.sciencedirect.com/science/journal/03088146
Aparece nas colecções:CIMO - Artigos em Revistas Indexados ao ISI/Scopus

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