Ascorbic acid contents, polyphenol contents and antioxidative capacity of fresh gooseberries

作者：Nikfardjam Martin Pour^*; Kopp Markus; Hempfling Katrin; Engel Karl Heinz

来源：Mitteilungen Klosterneuburg, 2013, 63(4): 213-222.

• gooseberry
• ascorbic acid
• vitamin C
• polyphenols
• TEAC

A total of 10 gooseberry cultivars was analyzed for their content of ascorbic acid and polyphenols by means of HPLC and for their content of total phenolics (Folin-Ciocalteu method) as well as for their antioxidative capacity (TEAC value) using a photometric analyzer. We also analyzed the influence of ripening on these parameters in the varieties Achilles', 'Bekay', and Xenia'. The results show that 'Bekay' and 'Rote Triumph' contain the highest amounts of ascorbic acid. During ripening a constant increase in ascorbic acid and polyphenol concentration was found. The main part (> 70 %) of the polyphenolic fraction in red gooseberry cultivars is due to anthocyanins consisting of a considerably high amount of acylated compounds (11 to 33 % of anthocyanins). Green cultivars show a reduced content of total phenolics as compared to the latter. Their phenolic constitution is attributed to relatively high amounts of hydroxycinnamic acid derivatives and flavanols. Thus, high polyphenol contents and anti oxidative capacities are only found in small, red coloured berries. These cultivars show TEAC values comparable to red currant.

• 出版日期2013