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KMID : 1007520020110040337
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Food Science and Biotechnology
2002 Volume.11 No. 4 p.337 ~ p.341
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Pulsed Photostimulated Luminescence(PPSL) of Mineral Separated from Irradiated Shellfish
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Yi, Sang Duk
Yang, Jae Seung/Oh, Man Jin/Chang, Kyu Seob
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Abstract
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Detection capability was investigated using minerals separated from irradiated shellfishes through PPSL system. The accumulated PPSL signals measured immediately after irradiation for minerals separated from bloody and freshwater significantly increased with irradiation doses up to 5 kGy and slightly decreased at 10 kGy, whereas those separated from the short-neck linearly increased from 0 to 10 kGy. The accumulated PPSL signals of minerals separated from bloody, freshwater, and short-neck decreased with increasing storage times, with those separated from bloody being approximately two times lower than those of freshwater, and short-neck. Threshold levels of bloody, freshwater and short-neck were 5,767±835, 1,611±377 and 3,474±1,020 photon counts for 60 s of measurement time, and 9,138±2,122, 2,708±674 and 5,137±1,583 photon counts for 120 s, respectively. At all irradiation doses, the accumulated PPSL signals of minerals separated from shellfish were the higher in the order of short-neck >freshwater>bloody. The accumulated PPSL signals of mineral samples showed higher decay rate under room condition than under darkroom condition except for short-neck.
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