Analytical Science and Technology (분석과학)

The Korean Society of Analytical Sciences (한국분석과학회)
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Low level tritium analysis using liquid scintillation counter

액체섬광계수기를 이용한 저준위 트리튬 분석법연구

  • Yoon, Yoon Yeol (Groundwater and Geothermal Research Division, Korea Institute of Geoscience and Mineral Resources (KIGAM)) ;
  • Cho, Soo Young (Groundwater and Geothermal Research Division, Korea Institute of Geoscience and Mineral Resources (KIGAM)) ;
  • Lee, Kil Yong (Groundwater and Geothermal Research Division, Korea Institute of Geoscience and Mineral Resources (KIGAM)) ;
  • Kim, Yongje (Groundwater and Geothermal Research Division, Korea Institute of Geoscience and Mineral Resources (KIGAM))
  • 윤윤열 (한국지질자원연구원, 지하수지열연구부) ;
  • 조수영 (한국지질자원연구원, 지하수지열연구부) ;
  • 이길용 (한국지질자원연구원, 지하수지열연구부) ;
  • 김용제 (한국지질자원연구원, 지하수지열연구부)
  • Received : 2007.09.03
  • Accepted : 2007.10.05
  • Published : 2007.10.25
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Abstract

Environmental low level tritium analysis was studied using liquid scintillation counter(LSC) and electrolytic enrichment method. To obtain low level blank count, various counting vials were investigated. Among them, teflon coated PE vial had a lower blank count rate (1.86 cpm) and we obtained 2.01 Bq/L detection and tritium separation factor was above 20. LSC counting efficiency obtained $28.70{\pm}0.27%$ using the NIST tritium standard water sample.

환경준위의 삼중수소 측정법을 확립코자 극저준위 액체섬광계수기(LSC)와 1 TU(Tritium Unit) 미만까지 측정이 가능한 전기분해 농축 장비의 특성을 연구하였다. 삼중수소의 측정한계를 알기위해 다양한 측정용기에 의한 장비의 바탕값을 조사한 결과 테프론 코팅된 폴리에틸렌 측정용기에서 1.86 cpm 수준이었으며 5 시간동안 계측할 경우 2.01 Bq/L로 17 TU의 검출한계를 얻었다. 400 mL 시료를 전기분해하여 20 mL까지 농축할 경우 0.8 TU의 검출한계를 얻었다. 전해농축시 수소와 삼중수소의 분리효율은 20 이상이었으며, 전해농축과정에 따른 삼중수소 회수율은 약 90%정도였다. NIST 삼중수소 표준시료를 사용하여 LSC의 측정효율을 검증한 결과 10 mL의 시료와 10 mL의 cocktail 용액을 사용한 경우 $28.70{\pm}0.27%$의 측정효율을 얻었다.

Keywords

References

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