title: Analysis of the volatile components of five Turkish Rhododendron species by headspace solid-phase microextraction and GC-MS (HS-SPME-GC-MS).
abstract: Volatile constituents of various solvent extracts (n-hexane, CH2Cl2, H2O) of 15 different organs (leaves, flowers, fruits) of five Rhododendron species (Ericaceae) growing in Turkey were trapped with headspace solid-phase microextraction (HS-SPME) technique and analyzed by GC-MS. A total of 200 compounds were detected and identified from organic extracts, while the water extracts contained only traces of few volatiles. The CH2Cl2 extract of the R. luteum flowers was found to exhibit the most diverse composition: 34 compounds were identified, with benzyl alcohol (16.6%), limonene (14.6%) and p-cymene (8.4%) being the major compounds. The CH2Cl2-solubles of R. x sochadzeae leaves contained only phenyl ethyl alcohol. This study indicated appreciable intra-specific variations in volatile compositions within the genus. Different anatomical parts also showed altered volatile profiles. This is the first application of HS-SPME-GC-MS on the volatiles of Rhododendron species.
authors.affiliation: Institute of Organic Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland. deniz@oci.unizh.ch
authors.forename: Deniz
authors.initials: D
authors.lastname: Tasdemir
authors.forename: Betül
authors.initials: B
authors.lastname: Demirci
authors.forename: Fatih
authors.initials: F
authors.lastname: Demirci
authors.forename: Ali A
authors.initials: AA
authors.lastname: Dönmez
authors.forename: K Hüsnü Can
authors.initials: KH
authors.lastname: Baser
authors.forename: Peter
authors.initials: P
authors.lastname: Rüedi
mesh_terms: D019905:Benzyl Alcohol / Q000737:chemistry* / Q000302:isolation & purification; D053138:Cyclohexenes; D000081007:Cymenes; D035264:Flowers / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D000077222:Limonene; D039821:Monoterpenes / Q000737:chemistry* / Q000302:isolation & purification; D018515:Plant Leaves / Q000737:chemistry; D029793:Rhododendron / Q000737:chemistry* / Q000145:classification; D013729:Terpenes / Q000737:chemistry* / Q000302:isolation & purification; D014421:Turkey; D014835:Volatilization
chemical_list: D053138:Cyclohexenes; D000081007:Cymenes; D039821:Monoterpenes; D013729:Terpenes; C007210:4-cymene; D000077222:Limonene; D019905:Benzyl Alcohol