Objective To study the content of nutritive ingredients and polyphenol compounds and antioxidant capacity of different kinds of hawthorn fruits.Methods The macronutrients,moisture,vitamins and minerals in 7 different hawthorn fruits were determined.The contents of phenolic acids and polyphenolic compounds and total organic acids were probed by HPLC.The antioxidant capacity was evaluated by oxygen radical absorbance capacity (ORAC) method.Results The contents of fructose and glucose were 1.57％-4.28％.The average moisture content was 75.5％,and dietary fiber was 5.79-8.07 g/100g.The contents of viatmin C and β-carotene were 72.3-97.7 mg/100g and 100-208 μg/100g,respectively.The hawthorn fruits contain various mineral elements,such as K (232.25-311.30 mg/100g),Ca (20.29-37.45 mg/100g),P (11-25 mg/100g),Fe and Zn (less than 1.50 mg/100g).There were 11 kinds of phenolic acids and polyphenolic compounds detected in hawthorn fruits.Total organic acids in hawthorn fruits were citric acid ＞ malic acid ＞ tartaric acid.The detected ORAC was 170.3-304.2μmol TE/g.Correlative analysis showed that the total flavonoids content was correlated with ORAC (r=0.981,P＜0.01); and the total polyphenols content was correlated with ORAC (r=0.886,P＜0.01).Conclusion Hawthorn fruits are rich in nutritive ingredient and polyphenolic compounds,and high in antioxidant capacity.There is a positive correlation between the antioxidant capacity and the contents of polyphenols in hawthorn fruits.
NETL
NSTL
维普
万方数据
