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The establishment of EVISA is funded by the EU through the Fifth Framework Programme (G7RT- CT- 2002- 05112).

Supporters of EVISA includes:



Purity is defined as the fraction of the named material present in the stated chemical form. When using standards (including reference materials) it is obviously important to know what their composition is in terms of their purity.

The term "purity" was found in the following pages:


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