The ERM® concept is a joint collaboration of three major European reference materials producers who guarantee to:
Use the most advanced principles currently available described in ISO Guides 34 and 35 for the production of certified reference materials.
Demonstrate rigorously homogeneity and stability for all materials and guarantee the certified value for every single unit over the complete shelf life of the materials
Be transparent in their approaches for the production of certified reference materials
ERM® is the registered trademark for European Reference Materials