title: Investigation of sunlight-induced deterioration of aroma of pummelo (Citrus maxima) essential oil.
abstract: Deterioration of aromas of pummelo essential oil (EO) induced by sunlight was compared to those induced by heat and oxygen exposure using the techniques of sensory evaluation and GC-MS analysis. The sunlight-exposed EO was found to possess an oily off-flavor odor, which was significantly different from its counterparts induced by oxygen and heat. The strong oily note of the sunlight-exposed EO was attributed to the existence of linalool oxides and limonene oxides, as well as the lack of neral and geranial, for which UV sunlight was revealed to be the critical contributor causing the chemical reactions for the aroma changes. The results demonstrated that UV sunlight could significantly affect the aroma of the pummelo EO, providing valuable information that will benefit the production and storage of EO-based aromatic products.
authors.affiliation: College of Bioengineering, Jimei University , Xiamen, Fujian Province 361021, People's Republic of China.
authors.forename: Hao
authors.initials: H
authors.lastname: Sun
authors.forename: Hui
authors.initials: H
authors.lastname: Ni
authors.forename: Yuanfan
authors.initials: Y
authors.lastname: Yang
authors.forename: Ling
authors.initials: L
authors.lastname: Wu
authors.forename: Hui-nong
authors.initials: HN
authors.lastname: Cai
authors.forename: An-feng
authors.initials: AF
authors.lastname: Xiao
authors.forename: Feng
authors.initials: F
authors.lastname: Chen
mesh_terms: D002957:Citrus / Q000737:chemistry / Q000528:radiation effects*; D005638:Fruit / Q000737:chemistry / Q000528:radiation effects; D006801:Humans; D009812:Odorants / Q000032:analysis; D009822:Oils, Volatile / Q000737:chemistry*; D010938:Plant Oils / Q000737:chemistry*; D013472:Sunlight / Q000009:adverse effects*; D013649:Taste
chemical_list: D009822:Oils, Volatile; D010938:Plant Oils
keywords: GC-MS; deterioration; essential oil; pummelo; sensory evaluation; sunlight