Monitoring on the Foods not Approved for Irradiation in Korea by PSL and TL Detection Method
2010
Cho, J.I., National Institute of Food and Drug Safety Evaluation, Korea Food and Drug Administration, Seoul, Republic of Korea | Lee, J.A., National Institute of Food and Drug Safety Evaluation, Korea Food and Drug Administration, Seoul, Republic of Korea | Lee, S.H., National Institute of Food and Drug Safety Evaluation, Korea Food and Drug Administration, Seoul, Republic of Korea | Hwang, I.G., National Institute of Food and Drug Safety Evaluation, Korea Food and Drug Administration, Seoul, Republic of Korea
This research was conducted to assess applicability of photostimulated luminescence (PSL) and Thermoluminescence (TL) methods for investigation of infant and young children products, nut, seasoned dried fish, spice, dried fruits, fruit and vegetable, grain and marine products, which are not approved for irradiation in Korea. PSL results show that the photon counts of non-irradiated samples were lower than 700, while those of irradiated samples were higher than 700. In TL measurement, TL ratio of irradiated samples were higher than 0.1 or ones can decrease below 0.1 whereas the temperature range of TL Glow curve was between 150-250℃. Monitoring result about 8 class of 325 not approved to irradiated foods, photon counts of samples were less than 700, and after re-irradiation TL Ratio (TL₁/TL₂) through re-irradiation step at 1 kGy were higher than 0.1 for the all samples. Therefore, these results suggested that PSL and TL measurements were useful detection methods for 8 class food products not approved to irradiation in Korea and all sample (325 cases) were not irradiated when we analysed by PSL and TL methods.
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