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Gas Sensing Metrology Group

The Gas Sensing Metrology Group is responsible for developing, critically evaluating, and applying techniques for the identification and measurement of gaseous species in atmospheres (urban, rural, and pristine) and process streams (automobile and stack).

The group applies these techniques to certification of gas standards in support of industries responding to U.S. and state regulations, environmental concerns, fairness in trade issues, and global climate change.  The primary concern is to provide the infrastructure for high-quality, traceable gas measurements, allowing better decision-making by industry, regulators, government officials, research scientists, and the public.  Measurement services are provided through the development of reference materials including NIST Traceable Reference Materials (NTRMs), Reference Materials (RMs), Standard Reference Materials (SRMs).


News and Updates

Projects and Programs


Stability of gaseous volatile organic compounds contained in gas cylinders with different internal wall treatments

George C. Rhoderick, Christina E. Cecelski, Walter R. Miller Jr., David Worton, Sergi Moreno, Paul Brewer, Joele Viallon, Faraz Idrees, Philippe Moussay, Yong D. Kim, Dal H. Kim, Sangil Lee, Annarita Baldan, Jianrong Li
Volatile organic compounds (VOCs) are a group of gas-phase compounds present in the atmosphere that affect air quality and Earth’s climate. Halocarbons, a

CCQM K121 – Monoterpenes in Nitrogen at 2.5 nmol mol-1 Final Report

Christina E. Cecelski, George C. Rhoderick, Joseph T. Hodges, Antonio M. Possolo, Cassie A. Goodman, Yong D. Kim, Dal H. Kim, Sangil Lee, Nicholas Allen, Marivon Corbel, David Worton, Richard Brown, Paul Brewer
The growing awareness of climate change, and continuing concerns regarding tropospheric and stratospheric chemistry, will require future measurements and

Tools and Instruments

Ozone Standard Reference Photometer

DESCRIPTIONThe Standard Reference Photometer (SRP) Program began in the early 1980s as collaboration between NIST and the U.S. Environmental Protection Agency



Group Leader

Office Manager