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Chemistry Programs & Projects

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High-Precision Isotopic Reference Materials
Last Updated Date: 01/20/2015

Recent innovative advances in the design and manufacture of isotope ratio mass spectrometers (IRMS) have revolutionized the study of natural and … more

Isotopes as Environmental Tracers in Archived Biological Specimens
Last Updated Date: 01/20/2015

There is increasing interest in the analytical and environmental communities in using mercury isotopic fingerprinting to identify source patterns … more

Methods and Measurements for Emerging Contaminants
Last Updated Date: 01/20/2015

Regulatory and health agencies within the US, Canada, and countries within Europe are continuously identifying compounds of suspected carcinogenic … more

Renewal of NIST Benchmark SRMs for Accurate Determinations of Trace Elements in Serum and Liver Tissues
Last Updated Date: 01/20/2015

The Centers for Disease Control and Prevention (CDC) collects data on elemental composition of human body fluids and tissues as part of major … more

The NIST Standard Reference Photometer for Ozone Measurement Traceability
Last Updated Date: 01/20/2015

The NIST Standard Reference Photometer (SRP), developed jointly with the U.S. Environmental Protection Agency (USEPA), has provided an … more

Audit of EPA Protocol Gas Suppliers
Last Updated Date: 01/20/2015

EPA Protocol gas mixture calibration standards are obtained by users to measure emissions of regulated gaseous species to ensure that they comply … more

NIST Traceable Reference Material Program for Gas Standards
Last Updated Date: 01/20/2015

Two NIST programs provide calibration gas standards with NIST analyses and concentration value assignment: the Standard Reference Material (SRM) … more

Traceable Calibration Gases: SRMs, NTRMS, and Protocol Gases
Last Updated Date: 01/20/2015

The Gas Metrology Group in the Chemical Sciences Division is tasked with providing traceability in gas analysis for the U.S. This group works with … more

Mercury Vapor Pressure Correlation
Last Updated Date: 01/20/2015

An apparent difference between the historical mercury vapor concentration equations used by the mercury atmospheric measurement community and a … more

Neutron Imaging for Health, Environment, and the Hydrogen Economy
Last Updated Date: 01/20/2015

Quantitative imaging tools enhance our ability to understand biological systems and achieve efficient hydrogen fuel cells. Today's metrological … more

Potential Primary Measurement Tool for the Quantification of DNA
Last Updated Date: 01/20/2015

The accurate mass determination of DNA and other nucleic acids is of critical importance in many clinical diagnoses and in forensic and molecular … more

Improving High-Performance Inductively-Coupled Plasma Optical Emission Spectrometry (HP-ICP-OES) Through Exact Matching
Last Updated Date: 01/20/2015

Using high-performance inductively coupled plasma optical emission spectrometry (HP-ICP-OES), relative expanded uncertainties on the order of 0.2 … more

pH Metrology
Last Updated Date: 01/20/2015

The pH metrology program supports traceability for pH measurements. This traceability rests on primary pH measurements in an ideal electrochemical … more

Evaluation of Independent High-Precision Assay Procedures for a High-Purity Primary Standard Reagent
Last Updated Date: 01/20/2015

NIST assigns assay values for a suite of high-purity reagents using two techniques: coulometry and titrimetry. Coulometry is based on Faraday's … more

Standard Solution SRMs Provide Traceability for Millions of Measurements
Last Updated Date: 01/20/2015

For decades, NIST has provided the SRM 3100 series single-element standard solutions. The certified values are traceable to the International … more

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