The Korean rice of Paldal variety was milled, in March, 1969, into brown rice and 92% polished one and each 1.5㎏ sample was packed in the kraft paper bags. With Co-60 gamma-irradiation, the samples were treated in the various ranges of 500, 800 and 1,000 Krad, and then they were stored at the room temperature. The changes of the contents of free amino acids in the samples were determined by the amino acid autoanalyzer (Yanagimoto, Japan, LC-type). The results obtained in June and October of the year were as follows.
1) In the disinfecting irradiation of rice by the higher doses of 500, 800 and 1, 000 Krad, there wasn´t any particular distinction between the control lot and irradiated lot in respect to the free amino acid contents.
2) The contents of free amino acids in rice during storage had the decreasing tendencies, and especially prominent in case of glutamic acid.
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