The Hypersil BDS is both base deactivated and encapped to improve peak shapes of basic solutes by minimising interaction with unreacted silanols. Hypersil ODS adds a monolayer of octadecyl silane (C18) to the hypersil silica support.

• Columns are endcapped to reduce silanol interaction
• For less retension with similiar selectivity, hypersil MOS columns provide a monolayer of dimethyloctylsilane (C8 alkyl chain)