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Size Exclusion Coupled to Reversed Phase Liquid Chromatography for the Characterization of Cranberry Products
Abstract
A combination of solvent extraction, size exclusion purification, and reversed-phase liquid chromatography with UV absorption and fluorescence detection was here used for the determination of flavan-3-ols and related oligomeric compounds in cranberry products. The method relied on robust, simple, and inexpensive instrumental equipment present in most of routine analytical laboratories. Sample extracts in methanol/water/hydrochloric acid solution (60:39:1, v/v/v) were subjected to size-exclusion chromatography (SEC) using Sephadex LH-20 as the sorbent to separate simple phenolic and oligomeric components. As a novel aspect of this work, the implementation of the SEC process in a reusable packed column was practically and economically highly advantageous. Fractions were analyzed by reversed-phase chromatography using a C18 core-shell analytical column and 0.1% formic acid aqueous solution and methanol as the components of the mobile phase. Chromatograms were recorded by UV absorption spectroscopy at 280 nm and by fluorescence spectroscopy at λex 280 nm/λem 347 nm. The method was applied to the determination of flavan-3-ols in various cranberry samples. Catechin, epicatechin, and procyanidins A2 and B2 were found in different amounts depending on the cranberry varieties.
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- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
Food Analytical Methods
no. 12,
pages 604 - 611,
ISSN: 1936-9751 - Language:
- English
- Publication year:
- 2019
- Bibliographic description:
- Bakhytkyzy I., Nuñez O., Saurina J.: Size Exclusion Coupled to Reversed Phase Liquid Chromatography for the Characterization of Cranberry Products// Food Analytical Methods. -Vol. 12, iss. 2 (2019), s.604-611
- DOI:
- Digital Object Identifier (open in new tab) 10.1007/s12161-018-1390-z
- Verified by:
- Gdańsk University of Technology
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