G A S E S (continued) SRM Sulfur Dioxide in Nitrogen (Certified for SO2


1661a* 1662a* 1663a* 1664a* 1689*


1693a* 1694a* 1696a*


) 500


1000 1500 2500 5


50 100 3500


*Available as a NIST Traceable Reference Material (NTRM); from commercial suppliers. A suppliers list is available on our website.


The gas NTRM program was established in 1992 in partnership with the U.S. EPA and specialty gas companies as a means for providing end users with the wide variety of certified gas standards needed to implement the Emissions Trading Provision of the 1990 Clean Air Act.


Nominal Amount of Substance Fraction (µmol/mol)


I N D U S T R I A L H Y G I E N E Materials on Filter Media


These SRMs consist of potentially hazardous materials deposited on filters to be used to determine the levels of these materials in industrial atmospheres.


SRM/RM Description 2783 8785 8786 Air Particulate on Filter


Set Size 2 filters, Particulate Matter on Filters 3 filters Filter Blank for RM 8785 2 filters,


Elemental Composition plus 2 blanks 9 reference values


1 reference value 37 2 information values


1 blank filter 37 — —


Diameter Pore Size (mm)


18 certified values 47


(µm) 0.4


40


WWW.NIST.GOV/SRM  PHONE: (301) 975-2200  FAX: (301) 948-3730  EMAIL: SRMINFO@NIST.GOV


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