You wouldn't be able to a/b the flavonoids from grapefruit
Quote:
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Originally Posted by United States Patent 4514427
Abstract:
The principle bitter flavor components of natural grapefruit juice, naringin and limonin are substantially reduced by treatment of the grapefruit juice with a weak base anion exchange resin having a styrene polymer matrix carrying functional groups derived from a mono or poly amine. The ion exchange treatment also reduces the acid content of the grapefruit juice and does not impair the nutrient content or the desirable flavors in the treated juice.
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Sounds like a good start there. Otherwise, I might suggest
Improvement of extracting naringin from grapefruit peel.
Wu, H. J., M. Calvarano and A. Di Giacomo
International Citrus Congress (7th : 1992 : Acireale, Italy), Acireale, Italy, International Society of Citriculture. 3: 1134-1135.
1992