CERTIFIED REFERENCE MATERIAL (CRM), accompanied by a certificate, one or more of whose property values are certified by a procedure which establishes its traceability to an accurate realization of the unit in which the property values are expressed, and for which each certified value is accompanied by an uncertainty at a stated level of confidence.

 

The CRMs are certified by a recognized certifying organization using approved certification procedures as instructed in ISO Guide 35:1989 "Certification of reference materials - General and statistical principles." The organization is usually a function of a federal government or recognized by a federal government or an accreditation organization. A CRM is the highest level to which an analytical reference material can be elevated because it is directly traceable to SI units and because of the attributed confidence in the company or organization which produced the material. Materials produced by national metrological laboratories (NML) such as NIST and ECRM are automatically CRM by default authority, it should be noted that often these NML certificates do not comply with modern expectations, but they remain CRM by default authority.

 

Some CRMs available from Brammer are:

Aluminum Base Solids
Sorted by Alloy and Chemistry

 

Copper Base Solids
Brass, Bronze, Sebiloys, etc.

 

Iron Base Solids
Iron, Steels, Cast Irons, etc.

 

Nickel Base Solids
Monels, Hastelloys, etc.

 

Other Metal Solids
Cobalt, Lead, Titanium, etc.