Characterisation of volatile compounds from the leaves of six Pittosporum species; an instrumental and sensory evaluation

摘要: Six Pittosporum species native to New Zealand, P. cornifolium, crassifolium, eugenioides, kirkii, tenuifolium, and umbellatum, were investigated in this study. The 88 volatile compounds released from their leaves identified by head space SPME whose optimized conditions are fibre coating PDMS, extraction time 30mins temperature 70°C with GC‐MS analysis. Most of these as sesquiterpenes, 21 which shown be major constitutes the species. They α‐pinene, sabinene, β‐pinene, β‐ myrcene, limonene, α‐copaene, (‐)‐β‐bourbonene, β‐cubebene, α‐gurjunene, caryophyllene, cis‐thujopsene, humulene, alloaromadendrene, γ‐muurolene, germacrene D, β‐cadinene, bicyclo[3.1.1]hept‐2‐ene, 2,6‐dimethyl‐6‐(4‐methyl‐3‐ pentenyl)‐, naphthalene, 1,2,4a,5,6,8a‐hexahydro‐4,7‐dimethyl‐1‐(1‐methylethyl)‐, bicyclo[2.2.1]heptane, 2‐methyl‐3‐methylene‐2‐(4‐methyl‐3‐pentenyl)‐, (1S‐endo)‐, 4,4‐dimethyl‐3‐(3‐methylbut‐3‐enylidene)‐2‐methylenebicyclo[4.1.0]heptane cyclohexane, 1‐ethenyl‐1‐methyl‐2‐(1‐methylethenyl)‐4‐(1‐methylethylidene)‐. main components umbellatum nonane, β‐caryophyllene 1‐ethenyl‐1‐methyl‐2‐(1‐methylethenyl)‐4‐(1‐ methylethylidene)‐, respectively. GCMS fingerprint spectra clearly showed difference plants. also subjected projective mapping odour profiles. This “green” “sweet” general descriptors for all Pittosproum. However, kirkii cornifolium described “fruity” “floral”. aromas P.tenuifolium crassifolium “bitter”, “woody” “grassy” a sense “spicy” eugenioides having “citrus” odour.