Journal
INDUSTRIAL CROPS AND PRODUCTS
Volume 32, Issue 3, Pages 439-444Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.indcrop.2010.06.011
Keywords
Anthocyanins; Flavonols; Polyphenols; Extraction; Ultrasound; Maceration; Delonix regia; Biodiversity
Categories
Funding
- French Embassy in Abidjan (Ivory Coast)
- CIRAD (DRS)
- French national network CNRS-INRA
Ask authors/readers for more resources
Flowers of Delonix regia trees from Ivory Coast are traditionally macerated in water to prepare beverages with beneficial health properties mainly due to their polyphenolic contents. Different maceration procedures, mimicking the traditional process, were compared on the basis of polyphenol content followed by HPLC-DAD analysis. Under optimized maceration ratio (R = plant sample weight/maceration media volume), plant extractions were compared, including acidified-water-based media and assisted-ultrasound or stirring extraction procedures. Diffusion kinetics of polyphenol families (anthocyanins, flavonols and phenolic acids) were followed by HPLC and lead to find optimum ratio (R = 1/100). Flavonol contents were 28.5,31, and 33.5 mu mol g(-1) (expressed as quercetin equivalent), using acidified-water (0.01N) media with sulphuric or citric acids. Anthocyanin and phenolic acid contents were within the same range for these water media (5.6 mu mol g(-1) as cyanidin equiv. and 27.5 mu mol g(-1) as gallic acid (GA) equiv., respectively). Ultrasound-assisted procedure shortened maceration time (three times shorter) but did not show higher level of total polyphenol than stirring-assisted procedure (39 mu mol g(-1) GA equiv.). This eco-friendly and low-cost extraction process will provide to African people, with safer quality and longer availability, polyphenol-rich bio-products. (C) 2010 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available