NIST logo
NIST Home > Chemistry Programs and Projects 
 

Chemistry Programs & Projects

(showing 211 - 225 of 355)
Multivitamin/Multielement Dietary Supplement SRM
Last Updated Date: 10/22/2012

The Chemical Sciences Division has produced SRM 3280 Multivitamin/Multielement Tablets for use as a control by laboratories making vitamin or … more

Dietary Supplement Analysis Quality Assurance Program
Last Updated Date: 10/22/2012

The National Institute of Standards and Technology (NIST) has established a Dietary Supplement Quality Assurance Program (DSQAP) in collaboration … more

Proficiency Test Results
Last Updated Date: 10/22/2012

Proficiency Test (PT) results are available at no cost to customers who have tested SRMs 2092, 2096, and 2098.   A PT result serves as a means to … more

Measurements and Standards for Botanical Dietary Supplements
Last Updated Date: 10/19/2012

As part of a multi-year interagency agreement among the National Institute of Standards and Technology (NIST), the National Institutes of Health's … more

Standard Solution SRMs Provide Traceability for Millions of Measurements
Last Updated Date: 10/18/2012

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

NIST SRM for Reproducible Analyses of Single-Walled Carbon Nanotubes
Last Updated Date: 10/16/2012

Carbon nanotubes (CNTs) are one of the first major nanoscale manufactured products to enter the market. Therefore, reliable and reproducible … more

Improved Benchtop Connectivity to Complex Microfluidic Devices
Last Updated Date: 10/10/2012

Despite their promise to enable high-throughput science and discovery, microfluidic devices have not yet been broadly adopted. An important … more

Cell-based Assay for Mechanistically-based Prediction of Cytoxicity
Last Updated Date: 10/10/2012

The most commonly used cell-based assays for measuring cytotoxicity often show poor reproducibility, require 24 h to complete, and rely on a … more

Mercury Vapor Pressure Correlation
Last Updated Date: 10/09/2012

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: 10/09/2012

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: 10/09/2012

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

Study of Microheterogeneity in Solid Reference Materials
Last Updated Date: 10/09/2012

Microbeam X-ray fluorescence (µXRF) has been used nondestructively to investigate elemental heterogeneity by constructing two-dimensional maps of … more

Improving High-Performance Inductively-Coupled Plasma Optical Emission Spectrometry (HP-ICP-OES) Through Exact Matching
Last Updated Date: 10/09/2012

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: 10/09/2012

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: 10/09/2012

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

Contact
General Information:
301-975-NIST (6478)
inquiries@nist.gov

100 Bureau Drive, Stop 1070
Gaithersburg, MD 20899-1070