Merck, NIST612, Trace elements in glass

General description
One unit of SRM 612 comprises of four wafers, sliced to 3 mm thickness from a hand-pulled rod. The wafers are of oval to circular cross-section with nominal diameter of 12 mm to 14 mm and an approximate mass of 1.4 g. The nominal mass fractions of 61 elements added to the glass matrix are in the range of 10 mg/kg to 80 mg/kg. For more information, please refer to the COA and SDS.
SRM 612_cert

SRM 612_SDS
Application
The Standard Reference Material (SRM) is primarily intended for facilitating the development of chemical methods for the analysis of trace elements in glass.
Features and Benefits
NIST certified values for elements are provided and values are traceable to international system of units (SI) and expressed as mass fraction (mg/kg)
Non-certified values, additional information, maintenance of certified values along with instructions for use and storage are provided on the NIST certificate.

Other Notes
Certified for the analytes listed below.
Antimony (Sb), Arsenic (As), Barium (Ba), Cadmium (Cd), Chromium (Cr), Iron (Fe), Lead (Pb), Manganese (Mn), Nickel (Ni), Rubidium (Ru), Selenium (Se), Silver (Ag), Strontium (Sr), Thorium (Th), Uranium (U)

Reference/Informational value is provided for the following analytes.
Cobalt (Co), Copper (Cu), Thallium (Th), Titanium (Ti), Strontium (87Sr/86Sr), Boron (B), Cerium (Ce), Dysprosium (Dy), Erbium (Er), Europium (Eu), Gadolinium (Gd), Gold (Au), Lanthanum (La), Lithium (Li), Neodymium (Nd), Potassium (K), Samarium (Sm), Ytterbium (Yb), Uranium (235U/UTotal)

See certificate for values and more details at nist.gov/SRM.
Legal Information
NIST is a registered trademark of National Institute of Standards and Technology
SRM is a registered trademark of National Institute of Standards and Technology