This study explored different parts of water caltrop in order to comprehensively utilize its pulp and pericarp. The ethanol- and water-soluble substances in the pulp and pericarp of water caltrop were extracted and determined for its main bioactive components. Meanwhile, the antioxidant activity of all extracts was evaluated by detecting their DPPH radical scavenging ability and anti-lipid peroxidation ability etc. The contents of saponins, phenols and flavonoids in ethanolic extracts, and polysaccharides in aqueous extracts of pericarp were (31.18±2.33), (189.52±5.31), (56.12±2.98) and (139.72±4.22) mg/g, respectively, which were all significantly higher than those in the pulp. In addition, all antioxidant indexes increased with increased amount of all extracts. As a whole, the ethanolic extracts of pericarp had the highest antioxidant activity, followed by aqueous extracts of pericarp, ethanolic extracts of pulp, and aqueous extracts of pulp. In summary, the pericarp of water caltrop contains rich bioactive substances and has good antioxidant capacity, which provides an important reference for deep processing of water caltrop, especially for reuse of its pericarp.
CUI Meilin
,
YU Youwei
. Antioxidant activity of aqueous and ethanolic extracts from different parts of water caltrop[J]. Food and Fermentation Industries, 2019
, 45(16)
: 122
-127
.
DOI: 10.13995/j.cnki.11-1802/ts.020965
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