Certified reference materials IRMM-468, IRMM-469 and ERM-EF001: update of certificates
16 September 2016Based on the stability data available for the certified reference materials IRMM-468 (thyroxine) and IRMM-469 (3,3',5 triiodothyronine), we decided to extend the validity of the certificate to one year after sales.
The most recent stability tests on the certified reference material ERM-EF001 (biodiesel) indicated a slight increase of the diglyceride mass fraction. We decided to increase the uncertainty from 0.15 % to 0.25 % (m/m) to account for this apparent change. We will continue monitoring all parameters.
Specimens of the revised certificates are in the detail pages of the CRMs.
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