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Essential Oil Analysis of Two Thymus spp. Growing Wild in Kosovo

Abstract Thymus jankae Cel. and Thymus pulegioides L. subsp. montanus (W.K.) Ronn growing wild in Kosovo have been analyzed for their volatile chemical profile using GC-MS technique. The essential oil of the plants was obtained by hydrodistillation with Clevenger apparatus. Essential oil of two samples of T. jankae Cel. resulted with yields of 0.60 % and 0.72 % respectively, while T. pulegioides L. essential oil yield was 1.58 % on dried weight. Exactly fifty-eight compounds were identified in all three samples. Two chemotypes resulted from the studied T. jankae Cel. essential oil samples: thymol chemotype with 45.78 % of thymol, and β-caryophyllene/caryophyllene oxide chemotype, with 33.25 % and 21.83 %, respectively. The chemical profile of the essential oil sample of T. pulegioides L. resulted with geraniol as the main constituent, with 34.52 % in total. Presented results confirm the influence of environmental and phenological conditions on the chemical composition.