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Stephen E. Long

Steve’s employment at NIST began with the provision of technical support and measurement traceability to the CAP clinical survey program. This evolved into the development of primary measurement methods and assignment of certified values for trace elements in environmental, clinical and biological materials using isotope dilution mass spectrometry in support of the Standard Reference Materials program. More recently he has been involved in the development of new innovative methods for the high-accuracy determination of mercury in challenging matrices including fossil fuels, and provision of primary traceability support for the EPA regulation of coal-fired power station mercury emissions. He has authored or co-authored more than 40 peer-reviewed publications. Stephen is now Team Leader for the Isotopic Methods Team in the Chemical Sciences Division.


  • Associateship of the Royal College of Science, 1979
  • Science and Engineering Research Council (SERC) Ph.D. Scholarship, 1979
  • Diploma of Membership of the Imperial College, 1982      
  • Hilger Spectroscopy Prize, Royal Society of Chemistry, London, 1986
  • AOAC International Collaborative Study of the Year, 1993      
  • US EPA Achievement Awards Program, 1996    
  • R&D 100 Award 2001, “Determination of Mercury in Fossil Fuels by ICP-MS”
  • CSTL Achievement Award, 2003
  • Admission as Fellow of the Royal Society of Chemistry, 2007

Membership and Professional Activities:

  • Fellow of the Royal Society of Chemistry (FRSC), London 
  • Royal Society of Chemistry, London
    - Committee member, Atomic Spectroscopy Group - 1987-1988
  • Society for Applied Spectroscopy, Cincinnati Section
    - President - 1990-1991
    - President-Elect - 1989-1990
  • National Committee for Clinical Laboratory Standards (NCCLS)
    - Sub-committee for Trace Element Analysis – 1993-1994
  • Society for Applied Spectroscopy
    - Local Delegate, Baltimore Washington Section – 1994-1996
  • Joint Committee for Traceability in Laboratory Medicine (JCTLM)
    - Electrolytes Review Panel - 2002-Present
Photograph of Stephen Long


Research Chemist
Chemical Sciences Division
Inorganic Chemical Metrology Group

Employment History:

  • Postdoctoral Fellow, Georgia Institute of Technology, 1982-1984
  • Senior Scientific Officer, Harwell Laboratory, UK, Atomic Energy Authority, 1984-1988
  • Research Chemist, U.S. EPA, 1988-1993
  • Fellow, College of American Pathologists, 1993-2000
  • Research Chemist, NIST, 2000-Present


  • Chemistry, BSc (hon), ARCS, Imperial College, University of London, UK, 1979
  • Analytical Chemistry, PhD, DIC, Imperial College, University of London, UK, 1982

Phone: 301-975-4101
Fax: 301-926-8671