An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Janet M. Cassard, Jon C. Geist, Theodore V. Vorburger, David T. Read, Michael Gaitan, David G. Seiler
The Microelectromechanical Systems (MEMS) 5-in-1 is a reference device sold as a NIST Reference Material (RM) that contains MEMS test structures on a test chip. The two RM chips (8096 and 8097) provide for both dimensional and material property
On September 23rd and 24th, 2010, the National Institute of Standards and Technology (NIST) hosted the fourth in a series of workshops addressing measurement needs for single wall carbon nanotubes (SWCNTs). Attendees representing an international community
Cancer is a heterogeneous disease characterized by changes in the levels and activities of important cellular proteins, including oncogenes and tumor suppressors. Genetic mutations cause changes in protein activity and protein expression levels that result
Mark S. Lowenthal, Nirina Rabe Andriamaharavo, Stephen E. Stein, Karen W. Phinney
A gas chromatography-mass spectrometry-based (GC-MS) method was developed for qualitative characterization of metabolites found in Vaccinium-fruit (berry) dietary supplement Standard Reference Materials (SRMs). Definitive identifications are provided for
Quantitative leak tests with vacuum technology have become an important tool in industry for safety and operational reasons and to meet environmental regulations. In lack of a relevant key comparison, so far, there are no calibration measurement
James Cline, David R. Black, Donald Windover, Albert Henins
The laboratory X-ray powder diffractometer offers several virtues that have rendered it a principal characterization device providing critical data for a range of technical disciplines. A continuous suite of hkl reflections can be collected with a single
Rick D. Davis, Mauro Zammarano, Szabolcs Matko, Roland H. Kraemer
This manuscript describes a methodology to measure the influence of an upholstery cover fabric to promote smoldering mass loss of a small-scale mock-up. The primary test metric is total mock-up mass loss after 45 min exposure to the smoldering ignition
Justin M. Zook, Amy Gargis, Lisa Kalman, Ira Lubin
We would like to draw your readers attention to the Next-generation Sequencing: Standardization of Clinical Testing (Nex-StoCT) guidelines, which represent an initial step toward ensuring that the results derived from next-generation sequencing (NGS)
John L. Molloy, John R. Sieber, Karen E. Murphy, Stephen E. Long, Stefan D. Leigh
SRM 2569 Lead Paint Films for Childrens Products is a new Standard Reference Material (SRM) developed for use primarily with XRF instrumentation. It consists of three paint coatings, with nominally 0 mg/kg, 90 mg/kg, and 300 mg/kg of Pb added, on
Thomas Gerrits, Brice R. Calkins, Nathan A. Tomlin, Adriana E. Lita, Alan L. Migdall, Sae Woo Nam, Richard P. Mirin
Photon number resolving transition-edge sensors (TES) are the cutting-edge enabling technology for high quantum efficiency photon counting when the number of photons of an input state needs to be determined. The TES developed at NIST reliably show system
Lee L. Yu, William C. Davis, Rabia Oflaz, Gregory C. Turk, Jeff M. Jarrett, Liza Valentin, Benjamin C. Blount, Dennis D. Leber, Eric L. Kilpatrick
Perchlorate, an inorganic anion, has recently been recognized as an environmental contaminant by the U.S. Environmental Protection Agency (EPA). Assessment of human exposure to perchlorate requires measurement of the anion in urine. Although the
The SRM Spotlight is a newsletter published by the Measurement Services Division for users of NIST standard reference materials. The Spotlight announces new reference materials and provides information about their use. In addition, this newsletter contains
David L. Duewer, Hugo H. Gasca-Aragon, Katrice A. Lippa, Blaza Toman
The analysis of higher-order value-assigned materials (HOVAMs) such as certified reference materials (CRMs) and value-assigned proficiency testing materials can help assess the equivalence of chemical measurement processes. When two or more such materials
William R. Kelly, Bruce S. MacDonald, John L. Molloy, Stefan D. Leigh, Andrew L. Rukhin
A procedure is presented whereby the fossil fuel community may design and mix SRMs in different proportions and thereby produce in their laboratory fossil fuel standards for selected elements of almost any desired concentration with uncertainties that are
Justin M. Zook, Daniel V. Samarov, Jennifer H. McDaniel, Shurjo Sen, Marc L. Salit
While the importance of random sequencing errors decreases at higher DNA or RNA sequencing depths, systematic sequencing errors (SSEs) dominate at high sequencing depths and can be difficult to distinguish from biological variants. These SSEs can cause
Intentionally deposited thin films exposed to atmosphere often develop unintentionally deposited few monolayer films of surface contamination. This contamination arises from the diverse population of volatile organics and inorganics in the atmosphere. Such
Image modeling establishes the relation between an object and its image when an optical microscope is used to measure the dimensions of an object of size comparable to the illumination wavelength. It accounts for the influence of all of the parameters
In 2009 NIST developed a U.S. national flow standard to provide traceability for flow meters used for custody transfer of pipeline quality natural gas. NIST disseminates the SI unit of flow by calibrating a customer flow meter against a parallel array of
Janet M. Cassard, Jon C. Geist, Michael Gaitan, David G. Seiler
The MEMS 5-in-1 Reference Material (RM) contains test structures for five standard test methods on one test chip, so companies can compare their in-house measurements taken on the RM with NIST measurements, thereby validating their use of the documentary
The SRM Spotlight is a newsletter published by the Measurement Services Division for users of NIST standard reference materials. The Spotlight announces new reference materials and provides information about their use. In addition, this newsletter contains
NIST Standard Reference Materials (SRMs) are used by industry, government, and academia to ensure the highest quality measurements. This catalog lists over 1200 individual reference materials produced and sold by NIST, each with carefully assigned values
Karen W. Phinney, Mary Bedner, Susan Tai, Veronica V. Vamathevan, Lane C. Sander, Katherine E. Sharpless, Stephen A. Wise
The National Institute of Standards and Technology (NIST), in collaboration with the National Institutes of Healths Office of Dietary Supplements (NIH-ODS) has developed a Standard Reference Material (SRM) for the determination of 25-hydroxyvitamin D [25
Paul C. DeRose, Melody V. Smith, Klaus Mielenz, Jeffrey R. Anderson, Gary W. Kramer
Standard Reference Material (SRM) 2943 is a cuvette-shaped, Cu0ion-doped glass, recommended for use for relative spectral correction of emission and day-to-day performance verification of steady-state florescence spectrometers. Properties of this standard
Stephen A. Wise, Caroline Bergh, Giovanna Luongo, Conny Ostman
Twenty-two phthalate diesters and organophosphate triesters have been determined in Standard Reference Material (SRM) 2585 Organic Contaminants in House Dust. Ultrasonic assisted solvent extraction and Solid Phase Extraction on a Florisil adsorbent were