The influence of vacuum impregnation on the fortification of apple parenchyma with quercetin derivatives in combination with pore structures X-ray analysis

► Flavonoid enrichment is affected by impregnation conditions and apple characteristics. ► Higher solution uptake in the inner apple cortex. ► Impregnation results depend on porosity, stiffness and cell morphology. ► X-ray analysis enabled characterization of pore size distribution.