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Abstract In order to explore the main phenolic substances and antioxidant activity of different parts of lichi fruit, the composition of polyphenols in different parts of Litchi chinensis was determined by HPLC and their antioxidant ability in different condition were determined by ABTS reduction assay. The results showed that: five lichi polyphenol samples were chemically different——the polyphenols in the flesh parts mainly contained proanthocyanidin B2, the polyphenols in the fresh core and shell mainly contained epicatechin, and the highest content of polyphenols with dried core and shell was proanthocyanidin A2, protocatechuic acid, respectively. The order of the five polyphenol samples on ABTS+ reduction ability was flesh > dried core > fresh core > fresh shell > dried shell. When the concentration of each lichi polyphenol sample was lower than 0.18 mg/mL, the ABTS+ reduction ability of each lychee polyphenol was higher than that of vitamin C except for dry lychee shell polyphenol. In addition, temperature, pH, and light had a relatively significant effect on the antioxidant activity of all five litchi polyphenol samples.
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Received: 07 May 2022
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2022, Vol. 35 
