Butyl modified silica phase for SPE, not endcapped
Features
- Base material silica, pore size 60 Å, particle size 45 µm, specific surface 500 m2/g, pH stability 2–8
- butyl phase, not endcapped, carbon content 7 %
- slightly more polar than C18 or C8
- due to shorter alkyl chains the silica surface is not completely shielded
Recommended application: compounds, which are too strongly retained on C18 or C8 e.g., analgetics from blood