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Detection of Different Ratios of Gamma-irradiated Turmeric by Photostimulated Luminescence and Thermoluminescence  

Lee, Ji-Ae (Department of Food Science and Technology, Kyungpook National University)
Chung, Hyung-Wook (Food Standards Division, Food Standards Department, Korea Food and Drug Administration)
Kwon, Joong-Ho (Department of Food Science and Technology, Kyungpook National University)
Publication Information
Korean Journal of Food Science and Technology / v.42, no.6, 2010 , pp. 648-652 More about this Journal
Abstract
This study was performed to investigate PSL and TL characteristics for the detection of different ratios of gamma-irradiated turmeric. It was possible to determine PSL and TL of 1- and 10-kGy irradiated turmeric. The TL ratios ($TL_1/TL_2$) of non-irradiated samples were lower than 0.001, while those of irradiated samples were higher than 0.355. In the PSL results, blended samples containing irradiated ingredients showed intermediate values for a 1% blending rate. Furthermore, TL analysis of blended samples seems to offer a promising method for irradiation identification by TL glow curve form and temperature range. The 1- and 10-kGy irradiated samples were able to be detected above a 4% blending rate. However, the TL ratio appeared as a threshold value below 0.1 for irradiated samples. Overall, TL analysis identified 4% blended samples containing gamma-irradiated turmeric.
Keywords
turmeric; gamma-irradiated; blending; ratio; PSL; TL;
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