Propolis, Volatiles, Phenolic C om pounds, Poplar Bud Exudate, GC-MS Propolis was analyzed by gas chromatography-mass spectrometry for both its headspace volatiles and for the less volatile com ponents o f its alcoholic extract (propolis balsam). 181 peaks were located o f which 171 representing 150 compounds were identified, including 28 identified in propolis for the first time. The majority o f compounds were typical o f poplar bud exudate.

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PB had the highest cyanide release at pH 1 (135 ug/g) and lowest release at pH 5.0-7.0 from the highest daily dose of PB (17.5 g) (21 ug/g). Considering the minimal lethal dose of cyanide is approximately 50 mg, the maximal cyanide released (1.6 mg) does not present a safety concern.

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