For normal-phase chromatography, the Ultisil product line offers new Diol bonded silica packing materials. Ultisil XB-Diol may also be used as a polar sorbent in normal phase. Like bare silica, Ultisil XB-Diol has the ability to form hydrogen bonds and has the capacity to separate structure isomers.

• More stable than the traditional normal phase columns, such as Silica, Amine
• Could be used in reverse phase analysis
• Similar polarity to Amine
• Good selectivity without excessive retention
• Improved peak shape versus bare silica