Photochemical and thermal degradation of a naturally occurring dye used in artistic painting. A chromatographic, spectrophotometric and fluorimetric study on saffron

Saffron is a yellow substance which is extracted from the stigmas of Crocus sativus L . and is used in painting, cooking and medicine. In this paper six components ( trans and cis crocins) with carotenoid structures were separated from natural saffron by HPLC and were characterised by their absorpti...

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Bibliographic Details
Published in:International Journal of Photoenergy 2004-01, Vol.6 (4), p.175-183
Main Authors: Vickackaite, Vida, Romani, Aldo, Pannacci, Danilo, Favaro, Gianna
Format: Article
Language:English
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Summary:Saffron is a yellow substance which is extracted from the stigmas of Crocus sativus L . and is used in painting, cooking and medicine. In this paper six components ( trans and cis crocins) with carotenoid structures were separated from natural saffron by HPLC and were characterised by their absorption and emission spectra. Photochemical and thermal processes which degrade the dye were also investigated. The effect of light promoted the cis ⇄ trans isomerization, while the thermal effect detached the glycosyl moieties.
ISSN:1110-662X
1687-529X
DOI:10.1155/S1110662X04000224