Abstract
The chemical composition of the oils obtained from Thuja occidentalis L. ‘malonyana’ and T. occidentalis ‘malonyana’ (selecton Misak) were determined by GC/MS for the first time. In total 33 components were statistically evaluated by multivariate methods to examine the complex variation of the data set. The main compounds in all oil samples (α-thujone, β -thujone, fenchone) represent more than 50% of the examined oils. Comparison of T. occidentalis ‘malonyana’ and T. occidentalis ‘malonyana’ (selecton Misak) oils showed no substantial differences in the chemical composition. Oil composition was very close to that of T. occidentalis of North American origin.