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Standards

Reference materials

Projects/Programs

Keyword

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Traceability in Molecular Spectrophotometry

Ongoing

This program, sometimes referred to as the Optical Filters program, has supported the development, certification, and (as specified) recertification of Standard Reference Materials ® (SRMs ®) for the verification of the transmittance (absorbance) and wavelength scales of spectrophotometers in the

Photography of gas cylinder storage facility with cylinders stored horizontally in movable cabinets.

Traceable Calibration Gases: SRMs, NTRMs, and Protocol Gases

Ongoing

The Gas Sensing Metrology Group prepares the highest level gas standards, known as Primary Standard Gas Mixtures based on precise gravimetric methods and accurate purity analysis. These Primary Standards are verified at NIST, stability confirmed through reanalysis over many years, and compared

SRM 3452 certified Seebeck coefficient data

Transport Property Measurements for Semiconductors and Energy Materials

Ongoing

The properties of materials and interfaces that govern reliability, performance, and thermal transport in advanced microelectronic packages are not fully characterized or understood, especially at device length scales wherein properties may differ significantly from bulk or literature values

Trusted AI framework for a new class of Standard Reference Materials and Data with exquisitely characterized uncertainty for billions of properties

Ongoing

The measurement of diverse molecular classes in biospecimens containing millions of molecules, known as omics, is increasingly important in the life sciences and medicine, and used to find novel cancer therapeutics, discover COVID-19 infection pathways, and diagnose diseases. NIST RMs and SRDs for

Vitamin D Metabolites Quality Assurance Program (VitDQAP)

Completed

Interlaboratory comparison studies of the VitDQAP supported the reliability of vitamin D measurements, including determination of 25-hydroxyvitamin D2, 25-hydroxyvitamin D3, and 3- epi-25-hydroxyvitamin D3 in human serum and plasma. Results from the comparison studies helped participants to make

Water Measurement Science

Ongoing

Measurements and Standards for Contaminants in Water Accurate measurements of contaminants in water are critical to ensure the usability and safety of our water supplies. NIST has developed Standard Reference Materials (SRMs) for validating or calibrating methods for inorganic contaminants including

X-ray computed tomography (CT) for medical applications

Completed

As scale lengths get smaller, diffraction becomes increasingly prominent in tomography. The work here develops diffraction tomography for laboratory sources. A new laboratory scale instrument at NIST/Boulder is dedicated to tomography of integrated circuit interconnects. Tomography software written

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