PSL, TL 및 ESR 분석을 통한 수입산 들깨, 아몬드 및 대두의 방사선 조사 여부 판별 특성
Detection of Gamma-irradiated Imported Foods (Perilla seeds, Almonds, and Soybeans) by Using PSL, TL, and ESR
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This study examined radiation detection properties of imported perilla seeds, almonds,and soybeans. Food samples were irradiated at doses of 0.5, 1, 2, and 4 kGy and analyzed byphoto-stimulated luminescence (PSL), thermoluminescence (TL), and electron spin resonance(ESR). The results of PSL showed that photon counts of irradiated perilla seeds and soybeanswere 32,959 counts∙60 sec-1 and 7,234 counts∙60 sec-1, respectively, at an irradiation dose of0.5 kGy, and the photon count of irradiated almonds was 5,581 counts∙60 sec-1 at an irradiationdose of 1 kGy. The results of TL showed that this technique is useful for detecting irradiatedsamples; the TL ratios (TL1/TL2) measured for the food samples at an irradiation dose of 0.5 kGywere 0.2301 for perilla seeds, 0.4595 for almonds, and 0.4827 for soy beans. Lastly, results of ESRspectroscopy for only soybeans revealed specific signals derived from free radicals captured in thecellulose. In conclusion, PSL, TL, and ESR methods can be used for the detection of gammairradiatedsoybean samples, whereas gamma-irradiated perilla seeds and almonds can beconfirmed by a serial detection with a TL method after PSL.
Abstract
This study examined radiation detection properties of imported perilla seeds, almonds,and soybeans. Food samples were irradiated at doses of 0.5, 1, 2, and 4 kGy and analyzed byphoto-stimulated luminescence (PSL), thermoluminescence (TL), and electron spin resonance(ESR). The results of PSL showed that photon counts of irradiated perilla seeds and soybeanswere 32,959 counts∙60 sec-1 and 7,234 counts∙60 sec-1, respectively, at an irradiation dose of0.5 kGy, and the photon count of irradiated almonds was 5,581 counts∙60 sec-1 at an irradiationdose of 1 kGy. The results of TL showed that this technique is useful for detecting irradiatedsamples; the TL ratios (TL1/TL2) measured for the food samples at an irradiation dose of 0.5 kGywere 0.2301 for perilla seeds, 0.4595 for almonds, and 0.4827 for soy beans. Lastly, results of ESRspectroscopy for only soybeans revealed specific signals derived from free radicals captured in thecellulose. In conclusion, PSL, TL, and ESR methods can be used for the detection of gammairradiatedsoybean samples, whereas gamma-irradiated perilla seeds and almonds can beconfirmed by a serial detection with a TL method after PSL.
참고문헌 (28)
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