Odor-Active Compounds in Cooked Rice Cultivars from Camargue (France) Analyzed by GC−O and GC−MS

• Published in: Journal of agricultural and food chemistry Vol. 56; no. 13; pp. 5291 - 5298
• Main Authors: Maraval, Isabelle, Mestres, Christian, Pernin, Karine, Ribeyre, Fabienne, Boulanger, Renaud, Guichard, Elisabeth, Gunata, Ziya
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 09.07.2008
• Subjects: Biological and medical sciences; Camargue area; Cereal and baking product industries; Chromatography, Gas; cooked foods; cooked rice aroma; cultivars; detection frequency; Flavors and Aromas/Chemosensory Perception; Food engineering; Food industries; France; Fundamental and applied biological sciences. Psychology; gas chromatography; Gas Chromatography-Mass Spectrometry; gas chromatography-olfactometry; GC−MS; GC−O; General aspects; Life Sciences; mass spectrometry; Methods of analysis, processing and quality control, regulation, standards; odor compounds; Odorants; olfactometers; organic extract; Oryza - chemistry; Oryza - classification; Oryza sativa; representativeness; rice; rice cultivars; scented rice; sensory properties; Smell; Volatilization; France; Europe; Camargue area; detection frequency; representativeness; GC−MS; rice cultivars; GC−O; organic extract; cooked rice aroma; Extract; GC-MS; Area; Analysis method; Cereal; Control method; Aroma; Detection; Odor; Cultivar; Rice; GC-O; ORGANIC EXTRACT; CAMARGUE AREA; REPRESENTATIVENESS; RICE CULTIVARS; DETECTION FREQUENCY; COOKED RICE AROMA
• ISSN: 0021-8561; 1520-5118; 1520-5118
• DOI: 10.1021/jf7037373

Volatile compounds of cooked rice from scented (Aychade, Fidji) and nonscented (Ruille) cultivars grown in the Camargue area in France were compared to that of a marketed Asian scented one (Thai) by gas chromatography−olfactometry (GC−O) and gas chromatography−mass spectrometry (GC−MS). GC−O analyses of the organic extracts resulted in the perception of 40 odorous compounds. Only two compounds, oct-1-en-3-one and 2-acetyl-1-pyrroline, were almost always perceived. Hierarchical cluster analysis showed that most of the difference between rice odors was linked to quantitative differences with only 11 compounds being specific to some of the rice. Sixty compounds were identified and quantified by GC−MS, including a few new odor-active components. Principal component analysis enabled us to differentiate scented cultivars from a nonscented one, and scented rice cultivars from Camargue from a Thai sample. Calculated odor-active values evidenced that the Thai sample odor differed from that of scented Camargue cultivars because of the degradation of lipids and of cinnamic acid compounds.