Retention factor (RF) = (Content After Processing / Content Before Processing) * Yield factor

mean RF value min max SD n # of references
 
Vegetables - Onion-family vegetables - Onion [Red], raw / Onion [Red], raw, stored at room temperature
Flavonoids
Flavonols Quercetin 4'-O-glucoside 0.53 0.41 0.62 0.073 7 1
Quercetin 1.51 0.94 2.41 0.65 3 1
Quercetin 3,4'-O-diglucoside 0.87 0.78 0.99 0.072 7 1