title: Screening for gamma-nonalactone in the headspace of freshly cooked non-scented rice using SPME/GC-O and SPME/GC-MS.
abstract: The determination of gamma-nonalactone as one of the important odor-active compounds in freshly cooked non-scented rice is reported. It was evaluated by gas chromatography-olfactometry (GC-O) analysis and identified by gas chromatography-mass spectrometry (GC-MS) analysis in the headspace above the freshly cooked non-scented rice samples extracted by using a modified headspace solid-phase microextraction (SPME) method. This component had a mass spectrum with a characteristic ion peak at m/z 85 (100%) and a linear retention index (RI) of 2,023 on a DB Wax column, consistent with those of an authentic sample of gamma-nonalactone. The odor characterization of a strong, sweet, coconut-like aroma of this compound was also validated by GC-O comparison with the authentic compound.
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou 510631, China. zhizeng@scnu.edu.cn
authors.forename: Zhi
authors.initials: Z
authors.lastname: Zeng
authors.forename: Han
authors.initials: H
authors.lastname: Zhang
authors.forename: Tao
authors.initials: T
authors.lastname: Zhang
authors.forename: Shigeru
authors.initials: S
authors.lastname: Tamogami
authors.forename: Jie Yu
authors.initials: JY
authors.lastname: Chen
mesh_terms: D002849:Chromatography, Gas / Q000379:methods*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D009812:Odorants / Q000032:analysis*; D012275:Oryza / Q000737:chemistry*; D052617:Solid Phase Microextraction / Q000379:methods*
references.citation: Adv Exp Med Biol. 2004;542:167-74
references.pmid: 15174579
references.citation: J Chromatogr A. 2006 Jan 13;1102(1-2):25-36
references.pmid: 16280128
references.citation: Molecules. 2008 Jun 12;13(6):1333-44
references.pmid: 18596659
references.citation: J Agric Food Chem. 2002 Feb 27;50(5):1101-5
references.pmid: 11853489
references.citation: J Agric Food Chem. 2001 Jan;49(1):245-9
references.pmid: 11170584
references.citation: J Agric Food Chem. 2008 Jan 9;56(1):235-40
references.pmid: 18081248
references.citation: J Oleo Sci. 2008;57(3):139-43
references.pmid: 18270462
references.citation: Anal Bioanal Chem. 2006 Nov;386(6):1791-802
references.pmid: 17009001