期刊
LWT-FOOD SCIENCE AND TECHNOLOGY
卷 146, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.lwt.2021.111654
关键词
Gas-expanded liquids; Vitamin C; Antioxidant activity; Phytochemical profiling; Carotenoids
资金
- CAPES-PRINT (Brazil) [88887.310560/2018-00472]
- MINECO, Spain [AGL2017-89417-R]
Ascorbic acid, phenolic compounds, and carotenoids were successfully extracted from acerola by-products using gas-expanded liquids, containing a pool of bioactive compounds to meet the demand for natural nutraceuticals rich in vitamin C and polyphenols.
Ascorbic acid, phenolic compounds and carotenoids were extracted from acerola (Malpighia emarginata DC.) byproducts using gas-expanded liquids (GXLs) based on carbon dioxide expanded ethanol at 40 degrees C and 7 MPa. The by-products generated in the processing of acerola: bagasse (seed and peel) and non-pomace (from the juice clarification step), were studied separately. The overall extraction yields obtained were 3.8 and 12.9 g/100 g for bagasse and non-pomace, respectively. Ascorbic acid was not detected in the bagasse extract, while 158.2 mg/ gextract was found in non-pomace extract, and 193.7 mg/g was found in the acerola juice powder. The higher the concentration of ascorbic acid, the higher the antioxidant activity of the extracts. The phytochemical profile obtained by LC-Q-TOF-MS/MS showed a higher number of phenolic compounds (hydroxycinnamic acids and flavonoids) in the bagasse and non-pomace extracts when compared to acerola juice. In addition, GXL promoted the extraction of a pool of carotenoids (lutein and 13-carotene), pheophytin and chlorophyll derivatives detected by LC-APCI-MS/MS. The obtained extracts, rich in bioactive compounds, open an opportunity for the valorization of acerola by-products, meeting the current demand for natural nutraceuticals rich in vitamin C and polyphenols.
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