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<p>Mercury is recognized by the World Health Organization as one of the “top ten chemicals of major public health concern.” To support global efforts in monitoring mercury contamination in drinking and environmental waters, analytical methods have continuously improved to achieve greater accuracy and lower detection limits. Critical tools in support of this endeavor are fit-for-purpose Certified Reference Materials (CRMs) with well-characterized mercury content present at trace or ultra-trace levels. The National Research Council of Canada (NRC) has produced and maintained such CRMs for several decades. This study presents the production and certification of the latest iteration, ORMS-6, mercury in water. This process involved rigorous cleaning protocols to mitigate background mercury contamination and real-time monitoring during ampouling to ensure that the material’s mercury content remained stable throughout the day-long process. The final consensus value for mercury content in ORMS-6 was determined by a combination of two independent methods: isotope dilution cold-vapor inductively coupled mass spectrometry and cold-vapor atomic fluorescence spectrometry.</p>

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Production and certification of ORMS-6, a certified reference material for mercury in water

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年1月31日

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  • Kelly L. LeBlanc,
  • Kenny Nadeau,
  • Indumathi Pihillagawa Gedara,
  • Calvin Palmer,
  • Christine Brophy,
  • Lu Yang,
  • Patricia Grinberg

摘要

Mercury is recognized by the World Health Organization as one of the “top ten chemicals of major public health concern.” To support global efforts in monitoring mercury contamination in drinking and environmental waters, analytical methods have continuously improved to achieve greater accuracy and lower detection limits. Critical tools in support of this endeavor are fit-for-purpose Certified Reference Materials (CRMs) with well-characterized mercury content present at trace or ultra-trace levels. The National Research Council of Canada (NRC) has produced and maintained such CRMs for several decades. This study presents the production and certification of the latest iteration, ORMS-6, mercury in water. This process involved rigorous cleaning protocols to mitigate background mercury contamination and real-time monitoring during ampouling to ensure that the material’s mercury content remained stable throughout the day-long process. The final consensus value for mercury content in ORMS-6 was determined by a combination of two independent methods: isotope dilution cold-vapor inductively coupled mass spectrometry and cold-vapor atomic fluorescence spectrometry.