Isotopic Reference Materials
Selected list of isotopic-reference material vendors is listed below. More information regarding available reference materials is available from the International database for certified reference materials COMAR
Isotopic reference materials for boron and cadmium may be purchased from the Federal Institute for Materials Research and Testing (Germany).
BAM European Reference Materials Programme
Reference materials and inter-comparison samples for isotopes of hydrogen, oxygen, carbon, nitrogen, lithium, boron, sulfur, and chlorine may be purchased from the International Atomic Energy Agency (Austria).
IAEA Reference Products for Environment and Trade
Isotopic reference materials may be purchased from IRMM.
European Reference Materials
Reference materials for isotopes of uranium, thorium, and plutonium may be purchased from the New Brunswick Laboratory, the US Government's Nuclear Materials Measurements and reference materials Laboratory.
NBL Certified Reference Materials
Isotopic reference materials of many elements may be purchased from the National Institute of Standards and Technology (USA).
NIST Standard Reference Materials Program
Reference materials for isotopes of mercury may be purchased from the National Research Council Canada.
Canadian Reference Materials
Reference materials for isotopes of hydrogen, oxygen, carbon, nitrogen, lithium, and sulfur may be purchased from the US Geological Survey.
Reston Stable Isotope Laboratory