Analytical Science and Technology (분석과학)

The Korean Society of Analytical Sciences (한국분석과학회)
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Preparation of wastewater-based reference materials for heavy metal analysis and interlaboratory study

중금속분석용 폐수표준물질 제조 및 실험실간 비교평가

  • Kim, Young-Hee (National Institute of Environmental Research of Environmental Research) ;
  • Song, Ki-Bong (National Institute of Environmental Research of Environmental Research) ;
  • Shin, Sun-Kyoung (National Institute of Environmental Research of Environmental Research) ;
  • Lee, Jung-Sub (National Institute of Environmental Research of Environmental Research) ;
  • Jeong, Gi-Taeg (National Institute of Environmental Research of Environmental Research) ;
  • Hong, Eun-Jin (National Institute of Environmental Research of Environmental Research) ;
  • Park, Jin-Ju (National Institute of Environmental Research of Environmental Research) ;
  • Yu, Suk-Min (National Institute of Environmental Research of Environmental Research)
  • 김영희 (국립환경과학원 환경건강위해성연구부 화학물질거동연구과) ;
  • 송기봉 (국립환경과학원 환경건강위해성연구부 화학물질거동연구과) ;
  • 신선경 (국립환경과학원 환경건강위해성연구부 화학물질거동연구과) ;
  • 이정섭 (국립환경과학원 연구전략기획실 측정기준과) ;
  • 정기택 (국립환경과학원 환경건강위해성연구부 화학물질거동연구과) ;
  • 홍은진 (국립환경과학원 환경건강위해성연구부 화학물질거동연구과) ;
  • 박진주 (국립환경과학원 환경건강위해성연구부 화학물질거동연구과) ;
  • 유석민 (국립환경과학원 환경건강위해성연구부 화학물질거동연구과)
  • Received : 2010.03.15
  • Accepted : 2010.06.01
  • Published : 2010.06.25
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Abstract

In this study, the wastewater-based reference material (RM) was prepared and certified for 7 trace metal elements with evaluation of uncertainties. The RM was distributed to 25 laboratories for the interlaboratory comparison testing. The certified values and expanded uncertainties were derived using ISO guideline 35 and the standard uncertainties for homogenieties were 0.43~2.67% of certified values. The analytical results from the interlaboratory comparison testing showed normal distributions and the robust means from the interlaboratory comparison testing were higher than the certified values of the RM for all analytes.

폐수 시료를 이용한 중금속분석용 수질표준물질을 제조하여, 납, 카드뮴, 크롬, 구리, 아연, 망간, 철 등 중금속 7 종에 대해 인증분석 및 불확도 등을 평가하고, 24 개 환경측정분석기관을 대상으로 실험실간 비교실험을 실시하였다. 폐수표준물질의 인증값 및 확장불확도는 KS A ISO 가이드 35(2005)에 의해 도출하였으며, 균질성에 기인한 표준불확도는 특성값의 0.43~2.67%로 나타났다. 환경측정분석기관간 비교실험에서 모든 항목의 비교실험 결과값이 정규분포를 따랐으며, 로버스트 평균값과 폐수표준물질의 인증값과 비교한 결과, 대부분의 항목에서 로버스트 평균값이 인증값보다 낮게 나타났다.

Keywords

References

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