Extraction of flavanones from immature Citrus unshiu pomace: process optimization and antioxidant evaluation.

Sci Rep

Department of Food Bioengineering, Jeju National University, Jeju, 63243, Republic of Korea.

Published: November 2020

Dietary guidelines recommend the consumption of flavonoid-rich extracts for several health benefits. Although immature Citrus unshiu pomace (ICUP) contains high levels of flavanone glycosides, many studies have concentrated on the optimization of flavonoid extraction from mature citrus peels. Therefore, we developed an optimized extraction method for hesperidin and narirutin from ICUP, and evaluated their antioxidant activities using ten different assay methods. The extraction conditions for the highest flavonoid yields based on a response surface methodology were 80.3 °C, 58.4% (ethanol concentration), 40 mL/g (solvent/feed), and 30 min, where the hesperidin and narirutin yields were 66.6% and 82.3%, respectively. The number of extractions was also optimized as two extraction steps, where the hesperidin and narirutin yields were 92.1% and 97.2%, respectively. Ethanol was more effective than methanol and acetone. The ethanol extract showed high scavenging activities against reactive oxygen species but relatively low scavenging activities for nitrogen radicals and reactive nitrogen species. The antioxidant activities showed a higher correlation with hesperidin content than narirutin content in the extracts. This study confirms the potential of an optimized method for producing antioxidant-rich extracts for the functional food and nutraceutical industries.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7673033PMC
http://dx.doi.org/10.1038/s41598-020-76965-8DOI Listing

Publication Analysis

Top Keywords

hesperidin narirutin
12
immature citrus
8
citrus unshiu
8
unshiu pomace
8
optimized extraction
8
antioxidant activities
8
narirutin yields
8
scavenging activities
8
extraction
5
extraction flavanones
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!