6. Frequently asked questions
Where can I buy an MRC?
While there are a limited number of CRM producers, there are a great many distributors. All companies offering specialized consumables or even measuring equipment also distribute reference materials.
How long does an MR last?
The useful life of an MR varies widely according to the field of application. It ranges from a few hours for materials containing certified levels of micro-organisms, to an unlimited period for rocks or metals.
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Frequently asked questions
Abbreviations and acronyms
Bibliography
ISO Guide 33: Reference materials – Good practice in the use of reference materials, ISO, Geneva
ISO Guide 35: 2006: Reference materials – General principles and statistics for certification, ISO, Geneva
European co-operation for Accreditation , Doc EA-4/14 INF :2003 : The Selection and Use of Reference Materials
Websites
Site of the Bureau International de Métrologie which provides documents such as the VIM
COMAR is a website dedicated to providing information on available...
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