Abstract: The effects of radiation sterilization of red kojic rice powder sold in domestic market were studied. The indices of sensory organ, nutrition and microbe level of irradiated red kojic rice powder were tested. It showed that the microorganism in red kojic rice powder can be killed effectively by γ-rays of more than 6 kGy while there is no significant difference in the sensory organ index and nutritional composition of red kojic rice powder between irradiated and non-irradiated powder. However, irradiationcan result in chroma decrease of red kojic rice powder. The effects of commercial application indicated that the hygienic quality of irradiated red kojic rice powder in radiation dose between 6～8 kGy is superior and the rate of chroma loss is less than 2%.

Key words: red kojic rice powder, microbe contamination, radiation technique, chroma loss, commercial application