Phenolic Compounds of Propolis from the Boreal Coniferous
Zone
Volume 56, Number 1 / June 2012
The profile of phenolic compounds in 19 propolis samples
from different provinces in Finland were analysed for the first time using
HPLC-DAD. Nine individual flavonoids (comprising 26% of the identified
phenolics), eleven cinnamic acid derivatives (36%), two caffeic acid
derivatives (14%), three chlorogenic acid derivatives (14%), and three other phenolic
acids (10%) were found in the propolis samples. The compounds found in the
largest quantities were methyl-naringenin and caffeic acid phenethyl ester
(CAPE). The phenolic profiles of Finnish propolis show marked differences when
compared with P. nigra and P. tremuloides propolis of Central European and
Canadian origins. The phenolic compounds found in propolis samples are commonly
found in the tree species growing in Finland. Non-metric multidimensional
scaling showed that samples were scattered and they did not form clear groups
according to the geographical origin or age of the sample.
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