Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Luminescence Detection Characteristics for Irradiated Dried Fishes Using PSL-TL System

Photostimulated luminescence-thermoluminescence 분석체계를 이용한 조사 처리된 건어류의 luminescence 판별 특성

  • Kim, Moon-Young (School of Food Science & Biotechnology, Kyungpook National University) ;
  • Kim, Gui-Ran (School of Food Science & Biotechnology, Kyungpook National University) ;
  • Ahn, Jae-Jun (School of Food Science & Biotechnology, Kyungpook National University) ;
  • Park, Kun-Sang (Korea Food & Drug Administration, Osong Health Technology Administration Complex) ;
  • Kim, Eun-Jeong (Korea Food & Drug Administration, Osong Health Technology Administration Complex) ;
  • Lee, Kyung-Jin (Korea Food & Drug Administration, Osong Health Technology Administration Complex) ;
  • Kwon, Joong-Ho (School of Food Science & Biotechnology, Kyungpook National University)
  • Received : 2012.07.03
  • Accepted : 2012.12.17
  • Published : 2013.02.28
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Abstract

Photostimulated luminescence (PSL) and thermoluminescence (TL) analyses were conducted for the detection of different irradiated dried fishes. All the non-irradiated samples provided PSL counts of lower than 700 (negative: $T_1$). Clear identification of irradiated sample was only possible for irradiated anchovy with PSL counts >5000; however, the results were unsatisfactory (not positive) for irradiated cod, dried filefish, hairtail, and herring samples. The contaminating silicate minerals were obtained by density separation or acid hydrolysis to perform TL analysis, which resulted in a low intensity of TL glow curve with a maximum peak after $250^{\circ}C$ for the non-irradiated samples that are irrespective of their kinds and methods for the mineral separation. The TL glow curves of high intensity with maximum peak in the temperature range of $150-250^{\circ}C$ were observed for all the irradiated samples. However, better results of TL glow curves and particularly of the TL ratio ($TL_1/TL_2$) were obtained when the minerals were separated by a acid hydrolysis method.

건어류의 조사처리 여부 확인을 위하여 PSL-TL 체계의 방법으로 분석하였다. 비조사 시료에서는 모두 700 보다 낮은 PCs를 나타내었고 조사된 멸치는 5000 이상의 PCs를 나타내었으나 조사된 대구, 쥐포, 디포리, 갈치는 비 조사 값을 나타내었다. TL분석에 이용되는 광물질을 얻기 위해 비중분리법과 산가수분해법을 이용하였으며, 그 결과 비 조사시료에서는 $250^{\circ}C$ 이상의 범위에서 낮은 intensity와 peak를 나타났으며 조사된 시료에서는 $150-250^{\circ}C$ 범위에서 높은 intensity와 peak를 나타내었다. 그러나 특히, acid hydrolysis 방법으로 미네랄을 분리하였을 때 TL ratio ($TL_1/TL_2$)와 TL glow curve 결과가 보다 정확한 결과를 얻을 수 있었다.

Keywords

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