Ivanova, Violeta and Stefova, Marina and Chinnici, Fabio (2010) Determination of the polyphenol contents in Macedonian grapes and wines by standardized spectrophotometric methods. Journal of the Serbian Chemical Society, 75 (1). pp. 45-59.
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Abstract
Wines and grapes contain a large array of phenolic compounds belonging
to non-flavonoids and flavonoids. This study evaluates the polyphenolic
contents of six commercial red and white Macedonian wines and four
grape varieties. Spectrophotometric methods were applied for the determination
of the total phenolics, the total flavonoids, the total anthocyanins and the
total catechins. The efficiency of acetone/water (80/20) and methanol/water
(80/20) solutions for the extraction of polyphenols from grape pulp, seeds and
skins were compared. The best extraction efficiency was achieved using acetone/
water. The obtained results showed that Macedonian grapes are rich in
polyphenols, whereby the highest concentration of total phenolics was found
for Vranec grapes. The analyzed wines contained high contents of polyphenol;
the highest contents were found for Disan wine produced from the Vranec variety
of grapes (1515 mg/L total phenolics, 1103 mg/L total flavonoids, 237
mg/L total anthocyanins and 845 mg/L total catechins). Principal component
analysis was employed to check possible groupings of the studied red and
white wine samples. A clear separation of white wines from red ones was observed.
| Item Type: | Article |
|---|---|
| Subjects: | Agricultural Sciences > Agricultural biotechnology Natural sciences > Chemical sciences |
| Divisions: | Faculty of Agriculture |
| Depositing User: | Violeta Ivanova Petropulos |
| Date Deposited: | 05 Nov 2012 08:20 |
| Last Modified: | 28 Oct 2013 12:42 |
| URI: | https://eprints.ugd.edu.mk/id/eprint/314 |
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