The Analytical Standards have been produced under guidelines of ISO and the International Vocabulary of Metrology (VIM)
Reference Material (RM) –
A Reference Material is sufficiently homogeneous and stable with respect to one or more specified properties, which has been established to be fit for its intended use in a measurement process
1: RM is a generic term
2: Properties can be quantitative or qualitative, e.g. identity of substances or species
3: Uses include calibration of measurement systems, assessment of measurement procedures, assigning values to other materials & quality control
4: A single RM cannot be used for both calibration and validation of results in the same measurement procedure
5: International Vocabulary of Metrology – Basic and General Concepts and Associated Terms has an analogous definition (VIM – ISO/IEC Guide 99:2007, 5.13), but restricts the term “measurement” to apply to quantitative values and not to qualitative properties. However, Note 3 of ISO/IEC Guide 99:2007, 5.13, specifically includes the concept of qualitative attributes, called “nominal properties”. (ISO Guide 30:1992/Amd 1:2008)
Certified Reference Material (CRM) – Reference material characterized by a metrologically valid procedure for one or more specified properties, accompanied by a certificate that provides the value of the specified property, its associated uncertainty, and a statement of metrological traceability
1: The concept of value includes qualitative attributes such as identity or sequence. Uncertainties for such attributes may be expressed as probabilities.
2: Metrologically valid procedures for the production and certification of reference materials are given in, among others, ISO Guides 34 and 35.
3: ISO Guide 31 gives guidance on the contents of certificates.
4: VIM has an analogous definition (ISO/IEC Guide 99:2007, 5.14). (ISO Guide 30:1992/Amd 1:2008)
Reference Material Certificate – Document accompanying a certified reference material stating one or more property values and their uncertainties, and confirming that the necessary procedures have been carried out to ensure their validity and traceability. (ISO Guide 30: 1992)
Reference Material Producer
Technically competent body (organization or company, public or private) that is fully responsible for project planning and management, assignment of and decisions on property values, authorization of property values and issue of the certificate or other statements for the reference materials it produces. (ISO Guide 34: 2000)
Certified Reference Materials for calibration of Spectrometer
Carbon & Low-Alloy Steels
Setting- Up Samples