title: Short Communication: Evaluation of the chemical composition of essential oil of Thuja occidentalis leaves grown in Peshawar, Pakistan by gas chromatography mass spectrometry.
abstract: Essential oil extracted from the fresh leaves of Thuja occidentalis were evaluated for its chemical composition employing GC-MS. Total of twenty nine components were identified and determined quantitatively using the area normalization procedure. Alpha-pinene and (+)-4-carene were found in high amount with a percentage concentration of 54.78 and 11.28 respectively. Other compounds which yielded appreciable amounts are: alpha-cedrol (6.87%), terpinolene (5.88%), p-menth-1-en-8-ol acetate (5.21%), beta-myrcene (4.04%), beta-pinene (2.26%), germacrene D (1.72%), sabinene (1.65%) and D-Limonene (1.62%).
authors.affiliation: Department of Chemistry, Abdul Wali Khan University Mardan, Pakistan.
authors.forename: Muhammad Nasimullah
authors.initials: MN
authors.lastname: Qureshi
authors.affiliation: Medicinal Botanic Centre, PCSIR Laboratories Complex Peshawar, Pakistan.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Siddique
authors.affiliation: Medicinal Botanic Centre, PCSIR Laboratories Complex Peshawar, Pakistan.
authors.forename: Inayat-Ur
authors.initials: IU
authors.lastname: Rahman
authors.affiliation: Medicinal Botanic Centre, PCSIR Laboratories Complex Peshawar, Pakistan.
authors.forename: Farina
authors.initials: F
authors.lastname: Kanwal
mesh_terms: D008401:Gas Chromatography-Mass Spectrometry; D009822:Oils, Volatile / Q000302:isolation & purification*; D010154:Pakistan; D064209:Phytochemicals / Q000302:isolation & purification*; D008517:Phytotherapy; D018515:Plant Leaves / Q000737:chemistry* / Q000254:growth & development; D010938:Plant Oils / Q000302:isolation & purification*; D010946:Plants, Medicinal; D029783:Thuja / Q000737:chemistry* / Q000254:growth & development
chemical_list: D009822:Oils, Volatile; D064209:Phytochemicals; D010938:Plant Oils