Reference Standard Sources

Analytical Reference Materials International

ASTM; International - Standards Worldwide

BAM (German)

Brammer Standard

CEN - European Committee for Standardization

Chemical Metrology - Client Services | NRC-INMS 

COMAR Database for Certified Reference Materials

Institute for National Measurement Standards

Institute for Reference Materials and Measurements

International Association of Geoanalysts

International Center for Diffraction Data

International Organization for Standardization

NIST: National Institute of Standards and Technology