The impregnation solution consisted of apple juice with 0.3 g/
100 mL apple peel extract high in flavonoids (hfv) (Val de Vire
Bioactives, Condé sur Vire, France) with an SCC of 11.1 0.1 Brix.
The total quercetin derivative content of the impregnation solution
averaged 96.4 2.5 mg/g dry mass (DM); the pH was 3.38. Apple
slices were immersed in the VI solution, high in apple peel flavonoids,
and fixed with watch-glasses to avoid floating