SRM and RM Identification System - IDENTIFICATION

The SRM/RM Identification System
The SRM Program offers for sale over 1100 different materials and adds 20 to 30 new materials as well as over one hundred renewal materials to its inventory each year. These materials all bear distinguishing names, numbers, and letters by which they are permanently and uniquely identified. The purpose of such identifiers is to clearly describe each and every material and, at the same time, systematically differentiate one from the other. The following certificate headings illustrate what's in the SRM or RM name.
	denotes a chemical composition SRM
	primary SRM numerical identifier renewal letter identifier (a=first renewal issue)
Standard Solution	intended use
Antimony	material description constituent certified
Lot No. 791103	specific to batch lot produced units

	denotes a physical property SRM
	primary SRM numerical identifier
Optical Fiber Diameter Standard	material description, intended use, and property certified
Serial No: X10001Y	specific to individually certified units

	denotes a NIST reference material
Reference Materials 8050, 8051, 8052	primary RM numerical identifier(s)
Fine Gold FAU6 Block, Wire and Turnings	material description
ROYAL CANADIAN MINT	certifying organization

Certificate of Traceability	denotes a NTRM*
Carbon Monoxide in Nitrogen	material description and intended use
(Nominal Amount-of-Substance Fraction-5000 mmol/mol)

NIST Traceable Reference Material No. 82638	primary NTRM numerical identifier
Batch No.: 960901	specific to batch lot produced units



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* For more information on the NTRM^® program for gases, please contact the Analytical Chemistry Division.
For convenience, the acronyms SRM, RM, and NTRM^® are preferentially used in conjunction with the primary numerical identifiers (including renewal letters-if applicable), to describe all NIST reference materials. This website, the catalog and its supplement are no exceptions; thus, the reference materials described herein, are identified by their short titles (e.g., SRM 3102a) rather than by their long titles (e.g., Standard Reference Material® 3102a). These short titles preserve the unique identifications of the materials involved and should be used in lieu of catalog numbers when ordering NIST reference materials.
Date created: 04/17/2002 Last updated: 07/19/2004 Technical/Website Inquiries: Contact Us