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Columns and cartridges for gas, ion, HPLC, low-pressure LC, and flash chromatography; includes pre-packed and open columns, packing, guard columns and accessories, and other supplies for flash chromatography.
Available in a variety of stationary phases that function in normal and/or reverse phase. MilliporeSigma™ Hibar™ HPLC Columns, 250-4.6 come with customized packing (please specify packing material) and are 250mmL x 4.6mmI.D.
Densely bonded, extensively endcapped dimethyloctyl stationary phase of Ascentis™ Express 2 μm C8 provides a stable, reversed-phase packing that can be used for basic, acidic, or neutral compounds.
ChromegaChiral™ CC4 (cellulose tris(4-chloro-3-methyl-phenylcarbamate) is another new product for high resolution chiral separations based on a new halogenated carbohydrate based chiral stationary phase.
The LC-CN phase is often used as a substitute for silica because it offers the advantages of a bonded phase (such as quick equilibration, and less sensitivity to small changes of the water content in the mobile phase).
ChromegaChiral™ CC2 is a modified cellulose including 3-chloro-4 methylphenyl-carbamate bonding groups coated on high purity, high performance spherical silica particles.
A typical mobile phase used with normal-phase silica columns consists of a hydrocarbon solvent such as hexane or heptane, mixed with a relatively small percentage of more polar solvent.