VSMOW2 Vienna Standard Mean Ocean Water 2 (Hydrogen and Oxygen Isotopes in Water)

This Reference Material (RM) is an international measurement standard that defines the zero of the VSMOW-SLAP (Vienna Standard Mean Ocean Water-Standard Light Antarctic Precipitation) d-scales for isotope-number ratios of hydrogen (H) and oxygen (O). The equivalent name for this RM, as used by the International Atomic Energy Agency (IAEA) and the U.S. Geological Survey (USGS), is VSMOW2. A unit of RM 8535a consists of one ampoule containing approximately 20 mL of water.
SRM 8535a_cert SRM 8535a _SDS

Reference/Informational value is provided for the following analytes.
Hydrogen (¹H/²H), Oxygen (¹⁶O/¹⁸O)

See certificate for values and more details at nist.gov/SRM.

NIST is a registered trademark of National Institute of Standards and Technology

SRM is a registered trademark of National Institute of Standards and Technology