Certified Reference Material for Use in 1H, 31P, and 19F Quantitative NMR, Ensuring Traceability to the International System of Units

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  • Romana Rigger
    Sigma-Aldrich ProductionGmbH, Industriestrasse 25, 9471 Buchs,Switzerland
  • Alexander Rück
    Sigma-Aldrich ProductionGmbH, Industriestrasse 25, 9471 Buchs,Switzerland
  • Christine Hellriegel
    Sigma-Aldrich ProductionGmbH, Industriestrasse 25, 9471 Buchs,Switzerland
  • Robert Sauermoser
    Sigma-Aldrich ProductionGmbH, Industriestrasse 25, 9471 Buchs,Switzerland
  • Fabienne Morf
    Sigma-Aldrich ProductionGmbH, Industriestrasse 25, 9471 Buchs,Switzerland
  • Kathrin Breitruck
    Sigma-Aldrich ProductionGmbH, Industriestrasse 25, 9471 Buchs,Switzerland
  • Markus Obkircher
    Sigma-Aldrich ProductionGmbH, Industriestrasse 25, 9471 Buchs,Switzerland

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<jats:title>Abstract</jats:title> <jats:p>In recent years, quantitative NMR (qNMR) spectroscopy has become one of the most important tools for content determination of organic substances and quantitative evaluation of impurities. Using Certified Reference Materials (CRMs) as internal or external standards, the extensively used qNMR method can be applied for purity determination, including unbroken traceability to the International System of Units (SI). The implementation of qNMR toward new application fields, e.g., metabolomics, environmental analysis, and physiological pathway studies, brings along morecomplex molecules and systems, thus making use of 1H qNMR challenging. A smart workaround is possible by the use of other NMR active nuclei, namely 31P and 19F. This article presents the development of three classes of qNMR CRMs based on different NMR active nuclei (1H, 31P, and 19F), and the corresponding approaches to establish traceability to the SI through primary CRMs from the National Institute of Standards and Technology and the National Metrology Institute of Japan. These TraceCERT® qNMR CRMs are produced under ISO/IEC 17025 and ISO Guide 34 using high-performance qNMR.</jats:p>

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