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Kenneth W. Pratt (Assoc)

Kenneth began his career at NBS in the areas of hydrodynamic voltammetry and trace-level amperometric and polarographic measurements. Subsequently, his emphasis has moved into the practice and theory of primary measurements (coulometry, pH, electrolytic conductivity) supporting the corresponding SRM programs. He has performed the NIST electrochemical measurements for 9 CCQM Key Comparisons, 6 CCQM Pilot Studies, and 4 SIM Pilot Studies, and has been involved in the certification of over 100 SRMs. Current research interests include primary electrochemical methods, trace level electroanalytical techniques (voltammetry and ASV), and the history of science and technology. He is the author or co-author of over 30 peer-reviewed publications in these areas.


  • U.S. Department of Commerce Bronze Medal, 2000
  • NIST Measurement Services Award, 1994
  • IR-100 Competition Winner (with Y. C. Wu and W. F. Koch), Research and Development magazine, 1988 (absolute determination of aqueous electrolyte conductivity)
  • NBS Sustained Superior Performance award, 1987
  • IR-100 Competition Winner, Research and Development magazine, 1984 (flow injection system using a vibrating electrode).

Membership and Professional Activities:

  • CCQM, Working Groups (WG)
    - Electrochemical Analysis WG (EAWG), 1998-present
    - Inorganic Analysis WG, 1998-Present
    - WG on KC and CMC Quality (EAWG Expert Representative), 2004 to present
  • Clinical and Laboratory Standards Institute, CLSI (formerly NCCLS), Area Committee on Clinical Chemistry and Toxicology, Subcommittee on Reagent Water, 2003-2005
  • IUPAC Commission V.5, Titular Member (1999-2001 term)
  • IUPAC Fellow, 2001
  • IUPAC pH Working Party, member 1997-2001
  • ASTM Committee D19.05, Trace Inorganics in Water, 1992-present


NIST's Engagement with CCQM Studies from 1992 to 2023: History and Performance

David L. Duewer, Christina Cecelski, Megan Cleveland, Nancy Lin, Katrice Lippa, Jacqueline L. Mann, John L. Molloy, Michael Nelson, James E. Norris, Kenneth W. Pratt, Sumona Sarkar, Hratch G. Semerjian, Robert L. Watters
This report documents the engagement and measurement performance of the National Institute of Standards and Technology (NIST) in studies coordinated by the

Methods for the SI Value Assignment of the Purity of Organic Compounds (IUPAC Technical Report)

David L. Duewer, Katrice Lippa, Brian Lang, Blaza Toman, Michael Nelson, Kenneth W. Pratt, Steven Westwood, Yoshitaka Yoshitaka Shimuzu, Takeshi Saito, Beatrice Lalerle, Xinhua Dai, Stephen Davies, Marina Ricci, Annarita Baldan, Stefan Sarge, Haifeng Wang, Ralf D. Josephs, Michal Mariassy, Dietmar Pfieffer, John Warren, Wolfram Bremser, Stephen L.R. Ellison, Ting Huang, Ales Fajgelj, Lindsey Mackay, Robert Wielgosz
Metrological traceability to the SI of the result of an analysis for an organic compound is achieved through a calibration hierarchy anchored in a primary

Degrees of Equivalence for Chemical Measurement Capabilities: Primary pH

David L. Duewer, Kenneth W. Pratt, Chainarong Cherdchu, Nongluck Tangpaisarnkul2 Nongluck Tangpaisarnkul2, Akiharu Hioki, Masaki Ohata, Petra Spitzer, Michal M?ri?ssy, Leo¿ Vysko¿il
The Key Comparison (KC) studies of the Consultative Committee for Amount of Substance – Metrology in Chemistry (CCQM) help ensure the reliability of chemical
Created March 15, 2019, Updated December 8, 2022