Effect of temperature on acidity and hydration equilibrium constants of delphinidin-3-O- and cyanidin-3-O-sambubioside calculated from uni- and multiwavelength spectroscopic data

Vidot K., Achir N., Mertz C., Sinela A.M., Rawat N., Prades A., Dangles O., Fulcrand H., Dornier M.
2016

Delphinidin-3-O-sambubioside and cyanidin-3-O-sambubioside are the main anthocyanins of Hibiscus sabdariffa calyces, traditionally used to make a bright red beverage by decoction in water. At natural pH, these anthocyanins are mainly in their flavylium form (red) in equilibrium with the quinonoid base (purple) and the hemiketal (colorless). For the first time, their acidity and hydration ...

Traitement et conservation des produits alimentaires; Composition des produits alimentaires