Analysis of the volatile components of five Turkish Rhododendron species by headspace solid-phase microextraction and GC-MS (HS-SPME-GC-MS)

摘要

Volatile constituents of various solvent extracts (n-hexane, CH2Cl2, H2O) of 15 different\udorgans (leaves, flowers, fruits) of five Rhododendron species (Ericaceae) growing in Turkey\udwere trapped with headspace solid-phase microextraction (HS-SPME) technique and analyzed\udby GC-MS. A total of 200 compounds were detected and identified from organic extracts,\udwhile the water extracts contained only traces of few volatiles. The CH2Cl2 extract of\udthe R. luteum flowers was found to exhibit the most diverse composition: 34 compounds\udwere identified, with benzyl alcohol (16.6%), limonene (14.6%) and p-cymene (8.4%) being\udthe major compounds. The CH2Cl2-solubles of R. x sochadzeae leaves contained only phenyl\udethyl alcohol. This study indicated appreciable intra-specific variations in volatile compositions\udwithin the genus. Different anatomical parts also showed altered volatile profiles. This\udis the first application of HS-SPME-GC-MS on the volatiles of Rhododendron species.