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Anthocyanin stability: a chemometrical approach
Cabrita, Luís; Fossen, Torgils; Flåten, Geir R.; Andersen, Øyvind M.The stability of cyanidin 3-glucoside towards five different factors (pH, anthocyanin concentration, sodium chloride concentration, ascorbic acid concentration, Oxygen) was studied during 60 days storage at room temperature using a 2^4-1 reduced factorial design. The influence of each individual parameter on anthocyanin stability was found to vary as a function of time. Sodium chloride and ascorbic acid were, r...
Colour and stability of the six common anthocyanidin 3-glucosides
Cabrita, Luís; Fossen, Torgils; Andersen, Øyvind M.This study on anthocyanin stability and colour variation (lambda max, absorptivity) in the pH range 1-12 during a period of 60 days storage at 10 and 23ºC, was conducted on the 3-glucosides of the six common anthocyanidins. It was mostly in the alkaline region that differences in colour and stability became significant. Although it has been generally accepted that anthocyanins are stable only at low pH values, ...
Colours of pure anthocyanidin 3-glucosides in aqueous solutions during storage
Cabrita, Luís; Fossen, Torgils; Andersen, Øyvind M.A study on anthocyanin stability and colour variation (intensity, lambda max., molar absorptivity) during storage at 10º and 23ºC over the pH range 1-12 was conducted for the 3-glucosides of the six common anthocyanidins. These results show that some anthocyanins may provide stable and intense bluish colour for extended application in slightly alkaline food products. For instance, there are some Mexican food (v...
Colour and stability of pure anthocyanins in aqueous solutions at high pH values
Andersen, Øyvind M.; Fossen, Torgils; Cabrita, LuísThis study on anthocyanin colour variation (intensity, lambda max, molar absorbptivity) 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 ...
Colour and stability of pure anthocyanins influenced by pH including the alkali...
Fossen, Torgils; Cabrita, Luís; Andersen, Øyvind M.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 sim...
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