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  • Applications of PTR-MS in Medicine and Biotechnology

    Tuesday, June 14, 2011
    Technical Article
    Wolfgang Singer Jens Herbig Rene Gutmann Klaus Winkler Ingrid Kohl Armin Hansel
    Proton transfer reaction-mass spectrometry (PTR-MS) is a well-established analytical tool for the measurement of volatile organic compounds (VOCs), and offers real-time detection and ... read more

  • A Weak Anion-Exchange/Reversed-Phase Mixed-Mode HPLC Column and its Applications

    Monday, October 01, 2007
    Technical Article
    Xiaodong Liu Christopher Pohl
    Mixed-mode columns address key challenges in analytical method development for HPLC. Reversed-phase (RP) columns (e.g., C18) are most widely used for HPLC separations. read more

  • Sizing Particles

    Tuesday, November 01, 2005
    Technical Article
    Michael Levin
    Many methods and numerous instruments are available from recognized vendors to measure particle size. read more
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