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Open AccessArticle

Parabens as Agents for Improving Crocetin Esters’ Shelf-Life in Aqueous Saffron Extracts

1
Cátedra de Química Agrícola. E.T.S.I. Agrónomos, Universidad de Castilla-La Mancha, Campus Universitario, 02071 Albacete, Spain
2
Área de Nutrición y Bromatología. Facultad de Veterinaria y CYTA. Universidad de Murcia. Campus de Espinardo. Espinardo 30071. Murcia. Spain
*
Author to whom correspondence should be addressed.
Molecules 2009, 14(3), 1160-1170; https://doi.org/10.3390/molecules14031160
Received: 26 February 2009 / Revised: 10 March 2009 / Accepted: 11 March 2009 / Published: 16 March 2009
The effect of parabens on the shelf-life of crocetin esters and picrocrocin in aqueous saffron solutions was studied. Degradation of saffron crocetin esters fits a first-order kinetics model, and the results indicated that the crocetin (β-D-glucosyl)-(β-D-gentiobiosyl) esters were more stable than the crocetin di-(β-D-gentiobiosyl) esters regardless of whether trans and cis isomers were considered. Under all tested conditions both parabens gave good results, especially propyl paraben that showed a greater influence on the degradation rate constant, except for cis-crocetin di-(β-D-gentiobiosyl) ester and cis-crocetin (β-D-glucosyl)-(β-D-gentiobiosyl) ester. In presence of propyl paraben (200 mg/L), the half-life periods of trans-crocetin di-(β-D-gentiobiosyl) esterimproved considerably, up to four-fold. Special attention has been paid to the effect of propyl paraben on 46 saffrons with different crocetin ester contents. No differences were observed in terms of picrocrocin. By analysis of variance, it is noteworthy that there were differences between the mean content of crocetin esters for all analysed saffron, except for trans-crocetin (β-D-glucosyl)-(β-D-gentiobiosyl) ester. View Full-Text
Keywords: Crocetin esters; Picrocrocin; Parabens; Saffron (Crocus sativus L.); Aqueous extract Crocetin esters; Picrocrocin; Parabens; Saffron (Crocus sativus L.); Aqueous extract
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Maggi, L.; Carmona, M.; Zalacain, A.; Tomé, M.M.; Murcia, M.A.; Alonso, G.L. Parabens as Agents for Improving Crocetin Esters’ Shelf-Life in Aqueous Saffron Extracts. Molecules 2009, 14, 1160-1170.

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