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Comparison of methods for compositional characterization of grape (Vitis vinifera L.) and apple (Malus domestica) skins

Paper ID Volume ID Publish Year Pages File Format Full-Text
19438 43065 2008 8 PDF Available
Title
Comparison of methods for compositional characterization of grape (Vitis vinifera L.) and apple (Malus domestica) skins
Abstract

A fundamental prerequisite for upgrading of fruit skins in press residues from juice, cider, and wine processes to food ingredients or supplements is the provision of methods for evaluation of the phenolics and cell wall carbohydrates in the materials. This study compared the monosaccharide yields obtained for different wine grape skin (Cabernet Sauvignon, Merlot, and Shiraz) and apple skin (Red Delicious (RD) and Golden Delicious (GD)) samples by trifluoroacetic (TFA) acid vs. hydrochloric (HCl) acid hydrolysis. Recovery values of monosaccharide standards after the acid treatments were also compared. TFA hydrolysis (2 M, 121 °C, and 2 h) resulted in higher monosaccharide yields from the fruit skin samples than HCl hydrolysis under the same conditions—after recovery value adjustments. Analyses of the phenols after extensive, sequential aqueous methanol (60%, w/w) extraction of the fruit skins confirmed that grape skins are a good source of anthocyanin pigments, notably the 3-glucosides of malvidin and cyanidin, and demonstrated that apple skins are a potential source of catechins.

Keywords
Monosaccharides; Phenolics; Skin cell walls; HPAEC-PAD; HPLC-DAD; Trifluoroacetic (TFA) acid
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Comparison of methods for compositional characterization of grape (Vitis vinifera L.) and apple (Malus domestica) skins
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Publisher
Database: Elsevier - ScienceDirect
Journal: Food and Bioproducts Processing - Volume 86, Issue 2, June 2008, Pages 79–86
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us