The objective of the study was to discriminate the cultivar, region and geographical origin of rice by using a mass spectrometry-based electronic nose. When applying the INDEx system, it was able to get a more differentiation than the results of the static headspace. The obtained ion fragments data from electronic nose were used for discriminant function analysis (DFA). These 16 species cultivar of rice have been separated into the direction of the first score from the discriminant function analysis (DF1) and second score from the discriminant function analysis (DF2). Cultivar of rice is easy to be determined. When selecting one of the cultivar of rice, it was confirmed that growing region was the method for being distinguished. It is estimated that the rice receives the environmental impacts of such soils and climate. FT-NIR can’t determine the geographical origin of rice. Also, it was confirmed that geographical origin could distinguish domestic rice from the Japan, China, America, Australia rice. As a result, both domestic rice and other country rice were possible to be determined accurately. In case of Japanese rice, the same varieties of rice is well distinguished than the different one since the effect of DF1 is dramatically increased, However, several cultivars of different origin of rice showed relatively small difference by DF1 value. Electronic nose will be useful to discriminate the cultivar and region and geographical origin of rice. And, electronic nose analysis results of milling degree of rice were moved to the left side of the DF1 about milling degree increases. Brown rice is found to have the most volatile components. Rice will be able to discriminate the milling degree with electronic nose. Both GC/MS and electronic nose were used for the difference of volatile ingredients using 20℃ incubator for 12 weeks. In case of electronic nose, the more storage time was required, the more volatile components were detected. Also, when the quality of milling degree of rice is lower, it is more likely for the volatile components to be detected. It had a tendency that the change of the volatile component was not fluctuated when milling degree of rise increased. GC/MS peak area is increased with the long storage time. Also, hexanal was detected in small amount as lipid oxidation products. Other components were not detected. In
case of three months storage according to milling degree of rice, lipid oxidation does almost not happen. The result of GC/MS studies was hard to see the changes. The change of samples was detected by applying the INDEx system of electronic nose since it could help to detect the change of the minor component.