title: Relationship between 3-Methyl-2,4-nonanedione Concentration and Intensity of Light-induced Off-odor in Soy Bean Oil.
abstract: A beany and green off-odor is developed in soy bean oil (SBO) under light-induced oxidative conditions. 3-Methyl-2,4-nonanedione (3-MND) was inferred as the compound responsible for the off-odor. In this study, we designed a simple quantification method for 3-MND in SBO, and evaluated the relationship between the 3-MND concentration and the intensity of the off-odor. 3-MND was analyzed by GC/MS with a thermal desorption unit system. By our method, the 3-MND concentration was found to increase with storage days and the SBO content under light exposure, and there was a high correlation between the measured 3-MND concentration and the intensity of the light-induced off-odor in SBO (R = 0.9586).
authors.affiliation: Fundamental Research Laboratory, J-Oil Mills, Inc.
authors.forename: Takashi
authors.initials: T
authors.lastname: Sano
authors.forename: Maiko
authors.initials: M
authors.lastname: Iwahashi
authors.forename: Jun
authors.initials: J
authors.lastname: Imagi
authors.forename: Toshiro
authors.initials: T
authors.lastname: Sato
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Yamashita
authors.forename: Eiichiro
authors.initials: E
authors.lastname: Fukusaki
authors.forename: Takeshi
authors.initials: T
authors.lastname: Bamba
mesh_terms: D000473:Alkanes / Q000032:analysis*; D003931:Diacetyl / Q000031:analogs & derivatives* / Q000032:analysis; D008027:Light; D009812:Odorants / Q000032:analysis*; D013024:Soybean Oil / Q000737:chemistry*
chemical_list: D000473:Alkanes; D013024:Soybean Oil; C475572:3-methyl-2,4-nonanedione; D003931:Diacetyl