The Journal of the Petrological Society of Korea (암석학회지)

The Petrological Society of Korea (한국암석학회)
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Effect on the Measurement of Trace Element by Pressure Bomb and Conventional Teflon Vial Methods in the Digestion Technique

압력용기 산분해법과 테플론 바이알에서의 산분해법이 미량원소의 함량측정에 미치는 영향

  • Lee, Seung-Gu (Geological Research Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Kim, Taehoon (Geological Research Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Tanaka, Tsuyoshi (Center for Chronological Research, Nagoya University) ;
  • Lee, Seung Ryeol (Geological Research Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Lee, Jong Ik (Division of Polar Earth-System Sciences, Korea Polar Research Institute)
  • 이승구 (한국지질자원연구원 국토지질연구본부) ;
  • 김태훈 (한국지질자원연구원 국토지질연구본부) ;
  • ;
  • 이승렬 (한국지질자원연구원 국토지질연구본부) ;
  • 이종익 (극지연구소 극지지구시스템연구부)
  • Received : 2016.02.01
  • Accepted : 2016.03.07
  • Published : 2016.06.30
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Abstract

Trace element abundances in the igneous rocks are important data for petrogenetic interpretation. Their concentrations are generally measured using ICP-MS from the dissolved solution. The acid digestion of rock powder can be performed by conventional teflon vial or pressure bomb. In this paper, we investigated a problem that happened during acid digestion experiment using conventional teflon vial or pressure bomb of BCR2 and GSP2 USGS rock standard materials. The results show that the measured concentrations of the elements like Cr, Ni, Zn, Ta, W in the BCR2 are different from the recommended values of USGS whereas those of the elements like Rb, Sr, Zr, Hf, Ta, W in the GSP2 are different from those values. Our experiment shows that defect of specific elements like Cr, Ni may happen during the sample digestion. Our results also indicate that the Cr, Ni, W, Zr, Hf, Ta concentration obtained based on an acid digestion of geological samples need to be careful in their geochemical interpretation.

화성암의 성인을 밝혀내는데 있어서 중요한 기초자료로서 지구화학적으로 중요한 의미를 가지는 미량원소의 함량은 대개는 암석가루의 산분해법에 의해 준비된 용액과 유도결합 플라즈마 질량분석기(ICP-MS)를 이용하여 측정한다. 이 때 암석가루의 산분해에는 일반적으로 테플론 바이알 혹은 압력용기를 이용한다. 이 논문에서는 미국지질조사소의 암석 표준시료인 BCR2, GSP2를 이용한 압력용기 혹은 테플론 바이알 산분해법 실험과정에서 발생될 수 있는 특정 미량원소의 손실 가능성에 대해 조사하였다. 실험결과, BCR2에서는 Cr, Ni, Zn, Ta, W의 변화가 제일 심했고, GSP2에서는 Rb, Sr, Zr, Hf, Ta, W 등에서 추천값(참고값)과 큰 차이를 보여주었다. 산분해 실험에 의한 화성암류내 W의 함량측정은 많은 주의가 필요하며, 이외에도 현무암류에서는 Cr과 Ni의 측정값에, 화강암류에서는 Zr, Hf, Ta의 측정값에 주의가 필요하다는 것을 확인할 수가 있었다.

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