| Abstract
| - Extracts from the peel and flesh of a citrus fruit, dekopon (Shiranuhi mandarin Suppl. J.), were obtainedunder reduced pressure followed by dichloromethane extraction. A total of 127 volatile chemicalswere identified in the extracts using gas chromatography (GC) and gas chromatography−massspectrometry (GC-MS). They included 11 monoterpenes, 32 monoterpenoids, 9 sesquiterpenes, 5sesquiterpenoids, 20 aliphatic alcohols, 14 aliphatic esters, 15 aliphatic aldehydes and ketones, 7aliphatic acids, and 10 miscellaneous compounds. The major volatile constituents of the extract fromthe peel were d-limonene (2380.33 mg/kg), myrcene (36.54 mg/kg), bisabolene (30.03 mg/kg),sabinene (21.12 mg/kg), trans-β-ocimene (16.96 mg/kg), valencene (12.84 mg/kg), decanal (8.14mg/kg), β-phellandrene (4.53 mg/kg), citronellol (4.51 mg/kg), 4-terpineol (4.50 mg/kg), linalool (4.13mg/kg), and citronellyl acetate (3.63 mg/kg). The major volatile constituents of the extract from theflesh were ethyl acetate (21.54 mg/kg), acetoin (7.23 mg/kg), 3-methylbutanol (2.79 mg/kg), p-mentha-cis-2,8-dien-1-ol (1.01 mg/kg), 3-methylbutanoic acid (0.95 mg/kg), isobutanol (0.59 mg/kg), trans-isopiperitenol (0.58 mg/kg), p-mentha-trans-2,8-dien-1-ol, and trans-carveol (0.44 mg/kg). Compositions of volatile chemicals in peel and flesh extract were considerably different: the peel extractwas rich in terpenes, whereas the flesh extract was rich in aliphatic compounds. Keywords: Citrus flesh; citrus peel; volatile chemicals; gas chromatography; dekopon
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