Application Note: Removal of Weakly Ionized Impurities
28 May 2008

After a period of use, the ion exchange capacity of a water purification pack starts to be used up and organic compounds and silica are released first even before the resistivity has fallen much below 18.2 MΩ-cm.

This technology note explains how these problems are avoided in the PURELAB Ultra as any organics and silica released from the first pack as it exhausts, are retained on the second, polishing pack which is still highly regenerated.