PSL과 ESR 분석에 의한 건조수산물의 방사선 조사 여부판별 특성 연구
Detection Properties of Irradiated Dried Seafoods Using PSL and ESR
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초록
The detection properties of gamma-irradiated (0~10 kGy) dried seaweed, driedshrimp, and seasoned dried filefish were investigated by photo-stimulated luminescence (PSL)and electron spin resonance (ESR). PSL could be used as a detection method on irradiated driedseaweed and dried shrimp as they showed photon counts greater than 5,000 counts/60 s (positive)in the irradiated samples with doses above l kGy. However, PSL could not be applied to detect irradiatedseasoned dried filefish, because gamma-irradiated sample at 10 kGy even yielded photoncounts less than 700 counts/60 s (negative). The ESR spectroscopy for only dried shrimp revealedspecific signals derived from free radicals captured in the shell of shrimp. As a result, it is consideredthat PSL or ESR methods for detection of gamma-irradiated dried shrimp and only PSLcan be used to detect gamma-irradiated seaweed. Furthermore, it is considered that hydrocarbonanalysis of seasoned dried filefish containing fat by GC/MS and Thermo Luminance (TL) analysisof dried seaweed should be studied for detection of irradiation.
Abstract
The detection properties of gamma-irradiated (0~10 kGy) dried seaweed, driedshrimp, and seasoned dried filefish were investigated by photo-stimulated luminescence (PSL)and electron spin resonance (ESR). PSL could be used as a detection method on irradiated driedseaweed and dried shrimp as they showed photon counts greater than 5,000 counts/60 s (positive)in the irradiated samples with doses above l kGy. However, PSL could not be applied to detect irradiatedseasoned dried filefish, because gamma-irradiated sample at 10 kGy even yielded photoncounts less than 700 counts/60 s (negative). The ESR spectroscopy for only dried shrimp revealedspecific signals derived from free radicals captured in the shell of shrimp. As a result, it is consideredthat PSL or ESR methods for detection of gamma-irradiated dried shrimp and only PSLcan be used to detect gamma-irradiated seaweed. Furthermore, it is considered that hydrocarbonanalysis of seasoned dried filefish containing fat by GC/MS and Thermo Luminance (TL) analysisof dried seaweed should be studied for detection of irradiation.
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