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Inorganic Chemical Metrology Group

The Inorganic Chemical Metrology Group is responsible for developing, critically evaluating, and applying techniques for the identification and measurement of inorganic and organometallic species using X-ray, optical, and mass spectrometry as well as classical analytical methods, pH, and electroanalytical methods.


The Inorganic Chemical Metrology Group (ICMG) conducts research on the measurement science that underpins the identification and quantification of inorganic chemical species. The ICMG develops, critically evaluates and applies analytical methods based on electroanalytical, gravimetric, titrimetric, X-ray spectrometric, optical spectroscopic, and mass spectrometric techniques and investigates fundamental physical and chemical processes to develop new analytical techniques and to improve existing analytical methodology.  The group is responsible for research and development activities in inorganic mass spectrometry, atomic emission spectrometry, X-ray fluorescence, electrochemistry, and classical methods of analysis, and maintains facilities and expertise for analysis at ultratrace concentrations.  This research is applied to value assignment of NIST Standard Reference Materials®, NIST Reference Materials™ and other reference materials resources important to U.S. industry and other government agencies.  Additionally, the ICMG provides advice and measurement services to other government agencies (federal, state, and local), scientific organizations, and U.S. industry and interacts with international standards organizations and National Metrology Institutes to establish comparability of measurement capabilities.


News and Updates

An SRM for Measuring Arsenic in Shellfish

NIST has developed many environmentally relevant Standard Reference Materials (SRMs) over the years, including whale blubber, fish and mussel tissues, human

Latest Publications

Spatial Variation in Mercury Accumulation in Bottlenose Dolphins (Tursiops spp.) in Southeastern U.S.A.

Mackenzie Griffen, Colleen E. Bryan Sallee, Tara Cox, Brian Balmer, Russell Day, Laura Garcia Barcia, Antoinette Gorgone, Jeremy Kiszka, Jenny Litz, Robin Perrtree, Teri Rowles, Lori Schwacke, Randall Wells, Eric Zolman
Bottlenose dolphins (Tursiops spp.) inhabit bays, sounds, and estuaries (BSEs) throughout the southeast region of the U.S.A. and are sentinel species for human

Certification of Standard Reference Material® 2983 Inorganics in Geoduck Clam Tissue (Panopea generosa)

Colleen E. Bryan Sallee, Melannie Bachman, Steven J. Christopher, Debra Ellisor, Michael Ellisor, Jennifer Hoguet, Samuel Huntington, Caleb Luvonga, Amanda Moors, Dhayaalini Nadarajan, Tomohiro Narukawa, Jennifer Ness, Rebecca Pugh, James H. Yen, Lee L. Yu
Standard Reference Material (SRM) 2983 Inorganics in Geoduck Clam Tissue (Panopea generosa) is intended to be used for the evaluation of methods for the


Press Coverage

A more perfect unit: the new mole

Popular Science
A video about the redefinition of the mole, featuring NIST's Savelas Rabb, Robert Vocke, and Stephan Schlamminger.

Featured Videos

NIST Analytical Chemistry Supports Industry and Health
NIST Analytical Chemistry Supports Industry and Health


Group Leader

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