Abstract
The present work aims to evaluate the yield, pH, the total polyphenols
and flavonoids contents in propolis collected from different ecosystems
in Algeria. Ten samples of propolis, issued from different floral and
geographical origins, have been collected by beekeepers between March
and April 2015 and were classified according to the geographical regions
(Est, West, Center and South) the samples were labeled from P1 to P10
and kept in dark at 4°C until use. The determination of polyphenols and
total flavonoids contents was carried out in a specialized laboratory in
Belgium. In this study, the propolis collected from the southern and
western regions had the highest concentrations of polyphenols 99,98;
71,6 and 76,1 Gallic acid/g of propolis. The same result was obtained
for flavonoids with 54,4; 38,7 and 42,9 mg Quercetin/g propolis. The
higher yield, after ethanolic extraction of the propolis, was obtained
from the southern region sample (P10) with a rate of 39,32%. Our study
showed that the richest propolis samples of Algeria, in total flavonoid
and total polyphenol contents were the ones collected from the southern
(P10) and the western region (P6 and P8).
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