Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

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 50 peer-reviewed publications.


  • Department of Commerce, Patent Award, 2012
  • Department of Commerce, French Award, 2010
  • Department of Commerce, Bronze Medal, 2009
  • Admission as Fellow of the Royal Society of Chemistry, 2007
  • CSTL Achievement Award, 2003
  • R&D 100 Award 2001, "Determination of Mercury in Fossil Fuels by ICP-MS"
  • US EPA Achievement Awards Program, 1996
  • AOAC International Collaborative Study of the Year, 1993
  • Hilger Spectroscopy Prize, Royal Society of Chemistry, London, 1986
  • Diploma of Membership of the Imperial College, 1982
  • Science and Engineering Research Council (SERC) Ph.D. Scholarship, 1979
  • Associateship of the Royal College of Science, 1979

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
  • NIH Office of Dietary Supplements
    - Committee on Iodine, 2011-Present
  • EUROMET Joint Research Project on Mercury Traceability Committee, 2015-Present


Certification of a pregnancy-specific reference material for thyroid biomarkers, vitamin D, and nutritional trace elements in serum

Ashley S. Boggs-Russell, Lisa E. Kilpatrick, Carolyn Q. Burdette, Denise S. Tevis, Zachary A. Fultz, Michael A. Nelson, Jeff M. Jarrett, Stephen A. Wise, Brittany Kassim, Stephen E. Long
Background Concentrations of critical metabolites, hormones, and nutritional elements change significantly throughout pregnancy. Therefore, increased matrix

Examining Mercury Transfer in the American Alligator

Stephen E. Long, Tracey B. Schock, Nilsen Frances
Prenatal exposure to environmental contaminants can cause developmental issues in humans and wildlife. Mercury (Hg) is particularly detrimental, often impairing

Dietary Supplement Laboratory Quality Assurance Program: Exercise O Final Report

Charles A. Barber, Melissa M. Phillips, Catherine A. Rimmer, Laura J. Wood, Maria R. Ale, Stephen E. Long, Elizabeth Mudge, Shannon L. Whitehead
The NIST Dietary Supplement Laboratory Quality Assurance Program (DSQAP) was established in collaboration with the National Institutes of Health (NIH) Office of

Health Assessment Measurements Quality Assurance Program: Exercise 2 Final Report

Charles A. Barber, Jeanice M. Brown Thomas, Carolyn Q. Burdette, Johanna Camara, Stephen E. Long, Melissa M. Phillips, Benjamin J. Place, Catherine A. Rimmer, Laura J. Wood, Lee L. Yu
The NIST Health Assessment Measurements Quality Assurance Program (HAMQAP) was launched in collaboration with the National Institutes of Health (NIH) Office of
Created October 9, 2019