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An Efficient Method for High-Purity Anthocyanin Isomers Isolation From Wild Blueberries and Their Radical Scavenging Activity

An Efficient Method for High-Purity Anthocyanin Isomers Isolation From Wild Blueberries and Their Radical Scavenging Activity

Nasima Chorfa, Sylvain Savard, Khaled Belkacemi

Food Chem. 2016 Apr 15;197 Pt B:1226-34.

PMID: 26675861

Abstract:

An efficient process for the purification of anthocyanin monomeric isomers from wild blueberries of Lake Saint-Jean region (Quebec, Canada) was developed and easy scalable at industrial purpose. The blueberries were soaked in acidified ethanol, filtered, and the filtrate was cleaned by solid phase extraction using silica gel C-18 and DSC-SCX cation-exchange resin. Anthocyanin-enriched elutes (87 wt.%) were successfully fractionated by preparative liquid chromatography. The major anthocyanins mono-galactoside, -glucoside and -arabinoside isomers of delphinidin, cyanidin, petunidin, peonidin and malvidin were isolated with a purity up to 100% according to their LC-MS and (1)H NMR spectra. The oxygen radical absorbance capacity (ORAC) of the obtained pure anthocyanins was evaluated. Delphinidin-3-galactoside has the highest capacity (13.062 ± 2.729 μmol TE/μmol), and malvidin-3-glucoside the lowest (0.851 ± 0.032 μmol TE/μmol). A mechanistic pathway preview is suggested for the anthocyanins scavenging free radical activity by hydrogen transfer.

Chemicals Related in the Paper:

Catalog Number	Product Name	CAS Number	Price
AP6906383-A	Delphinidin 3-glucoside chloride	6906-38-3	Price
AP6906394-B	Peonidin 3-glucoside chloride	6906-39-4	Price
AP7084244	Kuromanin chloride	7084-24-4	Price
AP7228786	Oenin chloride	7228-78-6	Price
AP7228786-A	Malvidin 3-glucoside chloride	7228-78-6	Price

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