Journal of Food Hygiene and Safety (한국식품위생안전성학회지)

The Korean Society of Food Hygiene and Safety (한국식품위생안전성학회)
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Application of PSL-TL Combined Detection Method on irradiated Composite Seasoning Products and Spices

방사선 조사 복합조미식품과 향신료의 확인을 위한 PSL-TL의 적용

  • Chung, Hyung-Wook (Food & Risk Standardization Division, The Bureau of Risk Management, Korea Food & Drug Administration) ;
  • Park, Sung-Kug (New Hazard Chemicals Division, Department of Food Safety Evaluation, Korea Food & Drug Administration) ;
  • Han, Sang-Bae (Food & Risk Standardization Division, The Bureau of Risk Management, Korea Food & Drug Administration) ;
  • Choi, Dong-Mi (New Hazard Chemicals Division, Department of Food Safety Evaluation, Korea Food & Drug Administration) ;
  • Lee, Dong-Ha (Food & Risk Standardization Division, The Bureau of Risk Management, Korea Food & Drug Administration)
  • 정형욱 (식품의약품안전청 위해기준과) ;
  • 박성국 (식품의약품안전청 신종유해물질과) ;
  • 한상배 (식품의약품안전청 위해기준과) ;
  • 최동미 (식품의약품안전청 신종유해물질과) ;
  • 이동하 (식품의약품안전청 위해기준과)
  • Published : 2008.09.30
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Abstract

Photostimulated luminescence(PSL)-Thermoluminescence(TL) combined analysis was applied to detect whether composite seasoning products and spices were irradiated or not. Samples were irradiated with $^{60}Co$ at $0{\sim}7$ kGy. A total of 12 different samples(6 of composite seasoning products and 6 of spices) was examined. Depending on the PSL results, TL analysis was performed. In case of both PSL positive(${\geq}5,000$ counts) and intermediate($700{\sim}5000$ counts), TL analysis had to be performed to confirm the result of PSL. Using TL, the shape of the glow curve(Glow 1) made it possible to identify the irradiated samples. In addition, The TL glow ratio(Glow 1/Glow 2) obtained by normalization was less than 0.1 for the non-irradiated samples and ${\geq}0.29$ for irradiated ones, respectively.

식품의약품안전청 제2007-22호로 고시된 PSL-TL 검지법의 적용 가능성을 확인하기 위하여 국내에서 방사선 조사가 허가되어 있는 복합조미식품과 향신료를 대상으로 실시한 결과, 향신료의 조사되지 않은 1개 시료가 PSL 분석결과 중간시료로 분류되어 추가적으로 TL 분석을 실시한 결과 방사선 조사되지 않은 것으로 판단되었고, 나머지 조사되지 않은 시료들은 PSL 분석결과 음성시료로 판정되어 방사선 조사되지 않은 것으로 판단되었다. 방사선이 조사된 시료들은 PSL 분석에서 양성시료로 분류되어 추가적으로 TL 분석을 실시하여 glow curve가 나타나는 온도범위와 glow curve의 형태를 확인하고 TL ratio를 구한 결과, 방사선이 조사된 시료는 $150{\sim}250^{\circ}C$ 사이에서 아주 강한 강도의 glow curve를 보여주었고, TL ratio가 0.29이상을 나타내어 방사선 조사된 것으로 판단하였다. 따라서 PSL-TL 검지법의 적용가능성이 확인되었다.

Keywords

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