For normal-phase chromatography, the ZORBAX product line offers a choice of bonded and non-bonded silica packings.
Made from highly pure (>99.995%) porous silica microspheres (pore size is the space between the solid silica microparticles)
Stronger than other silica types
Less acidic than ZORBAX-SIL, lower metal content
Low acidity and low metal content make ZORBAX Rx-SIL ideal for normal-phase separation of polar compounds that exhibit poor peak symmetry on more acidic silica
Useful for very hydrophilic compounds with high organic mobile phases in reversed phase mode