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http://dx.doi.org/10.3746/jkfn.2002.31.4.717

Detection of Gamma-Irradiated Korean Medicinal Herbs by ESR Spectroscopy  

Lee, Eun-Jeong (Laboratory for Detection of Irradiatde Foods, Korea Atomic Energy Research Institute)
Yang, Jae-Seung (Laboratory for Detection of Irradiatde Foods, Korea Atomic Energy Research Institute)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.31, no.4, 2002 , pp. 717-721 More about this Journal
Abstract
Study was carried out with electron spin resonance (ESR) spectroscopy to identify irradiated Korean medicinal herbs. Pueraria thunbergiana Benth., Angelica gigas Nakai, Agaricus blazei Murill and Astragalus membranaceus Bunge were irradiated with doses of 0, 1, 5 and 10 kGy at room temperature using a Co-60 irradiator. The irradiated Korean medicinal herbs exhibited an asymmetric absorption, which was different from the non-irradiated ones. The strength of ESR signals linearly increased by dose-dependent manner (1~10 kGy) and highly positive correlation coefficients ($R^2$=0.9428~0.9942) were obtained between the irradiation doses and the corresponding ESR signal intensities. Detection of the irradiated Korean medicinal herbs was possible even after 6 weeks of storage although the signal intensities of the irradiated samples decreased until 2 weeks at room temperature.
Keywords
ESR spectroscopy; irradiation; detection; Korean medicinal herb;
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