Characteristic odor components of Citrus sphaerocarpa Tanaka (Kabosu) cold-pressed peel oil.
The volatile components of Citrus sphaerocarpa Tanaka (Kabosu) cold-pressed peel oil were investigated by chemical and sensory analyses. Monoterpene hydrocarbons (more than 94.6%) were predominant in Kabosu peel oil, with limonene and myrcene accounting for the major proportions (70.5% and 20.2%, respectively). The Kabosu oxygenated fraction was characterized by quantitative abundance in aldehydes and a relatively wide variety of alcohols. The weight percentages of aldehydes, alcohols, and esters in Kabosu cold-pressed oil were 1.3%, 0.1%, and 0.1%, respectively. Aroma extract dilution analysis was employed for determination of the odors of Kabosu volatile components, flavor dilution factors, and relative flavor activities. Gas chromatography/olfactometry using Kabosu cold-pressed oil and its oxygenated fraction completed by a chiral analysis revealed that (R)-(+)-citronellal is a characteristic element of Kabosu peel oil odor. Careful sniff testing demonstrated that aqueous solutions of both 0.25% and 0.016% (R)-(+)-citronellal gave an odor similar to that of Kabosu.
Minh Tu
Nguyen Thi
NT
Department of Bioresources Science, Faculty of Agriculture, Kochi University, B-200 Monobe, Nankoku, Kochi 783-8502, Japan.
Onishi
Yuji
Y
Choi
Hyang-Sook
HS
Kondo
Yusuke
Y
Bassore
Solomon Mitiku
SM
Ukeda
Hiroyuki
H
Sawamura
Masayoshi
M
D000080462:Acyclic Monoterpenes; D000438:Alcohols / Q000032:analysis; D000447:Aldehydes / Q000032:analysis; D002849:Chromatography, Gas; D002957:Citrus / Q000737:chemistry*; D003080:Cold Temperature; D053138:Cyclohexenes; D005638:Fruit / Q000737:chemistry; D000077222:Limonene; D039821:Monoterpenes; D009812:Odorants; D012903:Smell; D013729:Terpenes / Q000032:analysis
D000080462:Acyclic Monoterpenes; D000438:Alcohols; D000447:Aldehydes; D053138:Cyclohexenes; D039821:Monoterpenes; D013729:Terpenes; C008574:beta-myrcene; D000077222:Limonene