A unit of Standard Reference Material (SRM) 1635a consists of 50 g of sub-bituminous coal that was ground to pass a 250μm (60 mesh) sieve, homogenized, bottled under an argon atmosphere, and sealed in an aluminized bag.

SRM 1635A_cert

SRM 1635A_SDS

This SRM is intended primarily for the evaluation of techniques used in the analysis of coals and materials of a similar matrix.

Certified for the analytes listed below.
Barium (Ba), Sulfur (S), Iron (Fe), Strontium (Sr), Sodium (Na)
Trace elements : Antimony (Sb), Mercury (Hg), Arsenic (As), Nickel (Ni), Chromium (Cr), Rubidium (Rb), Cobalt (Co), Selenium (Se), Copper (Cu), Thorium (Th), Lead (Pb), Uranium (U), Manganese (Mn), Vanadium (V)

Reference/Informational value is provided for the following analytes.
Aluminum (Al), Calcium (Ca), Hydrogen (H), Magnesium (Mg), Potassium (K), Titanium (Ti), Boron (B), Hafnium (Hf), Cadmium (Cd), Molybdenum (Mo), Cerium (Ce), Samarium (Sm), Cesium (Cs), Scandium (Sc), Chlorine (Cl), Zinc (Zn), Europium (Eu), Bromine (Br)

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