Author/Authors :
Zarezadeh Mehrizi, R Department of Food Science and Technology - Faculty of Agriculture - Isfahan University of Technology, Isfahan, Iran , Emam-Djomeh, Z Department of Food Sciences, Technology and Engineering - Faculty of Biosystems Engineering - University of Tehran, Alborz, Iran , Shahedi, M Department of Food Science and Technology - Faculty of Agriculture - Isfahan University of Technology, Isfahan, Iran , Keramat, J Department of Food Science and Technology - Faculty of Agriculture - Isfahan University of Technology, Isfahan, Iran , Rezaei, K Department of Food Sciences, Technology and Engineering - Faculty of Biosystems Engineering - University of Tehran, Alborz, Iran , Loni, E Research Center for Food Hygiene and Safety - Shahid Sadoughi University of Medical Sciences, Yazd, Iran
Abstract :
Background: Literature review shows that there are not sufficient data about
polyphenolic compounds of peel of Iranian pomegranate. So, this work was mainly
undertaken to determine phenolic compounds and antioxidant activity of dried peel of
Iranian pomegranate.
Methods: Pomegranate fruits were obtained from mature fruits grown in Saveh, Iran and
the Pomegranate Peel (PP) were dried with three different methods. Powders of PP were
extracted with four different solvents, using a soxhlet apparatus. The compounds of PP
extracts were analyzed by High Performance Liquid Chromatography (HPLC). Then,
yield percentage and Radical Scavenging Activity (RSA) were determined. Statistical
analysis was performed using the SAS 9.1 software.
Results: Different ranges of tannic acids, testosterone and α-estradiol, estriol, estrone,
cyanidin 3-glucoside, cyanidin3,5-diglucoside, pelargonidin 3-glucoside, pelargonidin
3,5diglucoside, and delphinidin 3-glucoside were identified. Both the highest yield
percentage (18.820±0.661) as well as the highest RSA percentage (63.862±0.376) were
obtained from the ethanol showing significant (p<0.05) difference with the other solvents.
Drying method of PP showed no significant (p>0.05) relationship with yield of extraction
and also antioxidant activity of the PP extracts.
Conclusion: HPLC analysis identified some various phenolic compounds in Iranian PP
extract showing considerable antioxidant activities. Although drying method showed no
relation with yield of extraction and also antioxidant activity of the PP extracts, but type
of solvent was effective on yield of extraction and type of extracted compounds of PP.
