The COSMOSIL 5C18-PAQ is the new member of our C18 column family already including the monomeric type MS-II, the polymeric type AR-II. This new column maintains stable retention time even in 100% aqueous mobile phases because the silica is only partially coated with C18 chains. The new polymeric linking style gives a strong acidic resistance to this column.
- Stable retention time in 100% aqueous mobile phase
- Good separation of hydrophilic compounds
- Resistance for acidic mobil phase
- Low carbon content controlled packing material
- Polymeric type linked C18
The figure shows the change of retention time for Thymine with 100% aqueous mobile phase (20mmol/l phosphate buffer pH7). After analyzed 4 times (1 hour), flow of mobile phase were stopped for 1 hour, and then similarly analyzed again. The conventional C18 showed change of retention time, but COSMOSIL 5C18-PAQ mantained stable retention time.
high purity porous spherical silica
Average particle size
Average pore size
Specific surface area
polymeric octadecyl group
End capping treatment