Essential oil composition of two Thuja L. (Cupressaceae) species from Canada
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The essential oil needles of Thuja occidentalis L. and Tetraclinis articulate (Vahl) Masters (synonym: Thuja articulate) growing in Canada, were analyzed by HS-SPME / GC-MS technique. Thirty one and fifty one compounds were identified representing 92.30% and 93.42% of the oil, respectively. The main constituents of Thuja occidentalis were bornylacetate (30.00%), limonene (7.56%), camphor (7.33%), α-pinene (7.18%) and δ-cadinene (6.01%), whereas α-pinene (32.67%), 3-carene (18.29%), β-myrcene (11.69%) and bornylacetate (5.88%) were the major constituents of Tetraclinis articulata. The results showed that T. occidentalis chemotype was bornylacetate whereas α-pinene was chemotype of Tetraclinis articulate and HS-SPME method can be applied to routine control analysis of aromatic and medicinal plants.
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