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Health Sciences Authority

Certified Reference Materials

Download information on our Certified Reference Materials here.

Last updated 29 April 2026

Certificate of Analysis (CoA)

Frequently Asked Questions (FAQs):

1. Are HSA CRMs produced according to ISO 17034?
2. Are HSA CRMs metrologically traceable and accompanied by a Certificate of Analysis (CoA)?
3. How are the assigned values of the CRMs determined?
4. Do the assigned values come with associated measurement uncertainties?
5. What is the validity period of the CRMs?
6. How should the CRMs be stored?
7. How will the CRMs be delivered to customers?

For more information