Whether for training purposes, for testing devices or the internal method check: you can rely on our reference materials. Our samples have been qualified within the scope of proficiency tests and checked for constancy of values at regular intervals.
Each sample set contains at least two different samples to determine results at more than one level. This increases your certainty of not only measuring precisely, but also correctly!
Further information about our reference materials, as well as the possibility to request reference material for many methods, can be found in our reference material catalogue.