title: Comparison of aroma active and sulfur volatiles in three fragrant rice cultivars using GC-olfactometry and GC-PFPD.
abstract: Aroma volatiles from three cooked fragrant rice types (Jasmine, Basmati and Jasmati) were characterised and identified using SPME GC-O, GC-PFPD and confirmed using GC-MS. A total of 26, 23, and 22 aroma active volatiles were observed in Jasmine, Basmati and Jasmati cooked rice samples. 2-Acetyl-1-pyrroline was aroma active in all three rice types, but the sulphur-based, cooked rice character impact volatile, 2-acetyl-2-thiazoline was aroma active only in Jasmine rice. Five additional sulphur volatiles were found to have aroma activity: dimethyl sulphide, 3-methyl-2-butene-1-thiol, 2-methyl-3-furanthiol, dimethyl trisulphide, and methional. Other newly-reported aroma active rice volatiles were geranyl acetate, β-damascone, β-damascenone, and ɑ-ionone, contributing nutty, sweet floral attributes to the aroma of cooked aromatic rice. The first two principal components from the principal component analysis of sulphur volatiles explained 60% of the variance. PC1 separated Basmati from the other two cultivars and PC2 completely separated Jasmine from Jasmati cultivars.
authors: Department of Food Technology, Faculty of Science, Siam University, 38 Petchkasem Road, Phasi-Charoen, Bangkok 10160, Thailand. Electronic address: kanjana@siam.edu.
authors: Kanjana
authors: K
authors: Mahattanatawee
authors: Institute of Food and Agricultural Sciences, Citrus Research and Education Center, University of Florida, 700 Experiment Station Road, Lake Alfred, FL 33850, USA.
authors: Russell L
authors: RL
authors: Rouseff
mesh_terms: D008401:Gas Chromatography-Mass Spectrometry; D009812:Odorants / Q000032:analysis*; D064367:Olfactometry; D012275:Oryza / Q000737:chemistry* / Q000145:classification; D025341:Principal Component Analysis; D013455:Sulfur / Q000032:analysis*; D055549:Volatile Organic Compounds / Q000032:analysis*
chemical_list: D055549:Volatile Organic Compounds; D013455:Sulfur
keywords: Cooked rice; Headspace SPME; PCA