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COSMOSIL C18-AR-II HPLC Columns

COSMOSIL C18-AR-II is a polymeric type of C18 phase. It shows exceptional stability and long lifetime at low pH. This phase is recommended for the separations requiring acidic mobile phase conditions. It also shows superior molecular shape selectivity to monomeric type C18 columns.

Packing Material3C18-EBC18-MS-IIC18-AR-IIC18-PAQ
USP CodeL1L1L1L1
Silica GelHigh Purity Porous Spherical Silica
Average Particle Size3 µm3, 5, 15 µm5, 15 µm
Average Pore Sizeapprox. 120 Å
Specific Surface Areaapprox. 300 m2/g
Stationary PhaseOctadecyl Group
Bonding TypeMonomericPolymeric
Main InteractionHydrophobic Interaction
End Capping TreatmentNear-perfect Treatment
Carbon Contentapprox. 14.5%approx. 16%approx. 17%approx. 11%
pH Range2-10*1.5-7.5*2-7.5
FeaturesThis phase with a better end-capping treatment offers improved peak shape and separation particularly
for basic compounds.		This phase is recommended for most applications but particularly effective for basic compounds.This phase is recommended for separations requiring acidic mobile phase conditions. It also shows superior molecular shape selectivity to monomeric type C18columns.This phase is designed to offer superior retention of polar compounds and excellent reproducibility in highly aqueous mobile phases, even in 100% aqueous.

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COSMOSIL 3C18-AR-II 3 μm HPLC Columns
COSMOSIL 3C18-AR-II 3 μm HPLC Columns
COSMOSIL 5C18-AR-II 5 μm HPLC Columns
COSMOSIL 5C18-AR-II 5 μm HPLC Columns
COSMOSIL 15C18-AR-II 15 µm HPLC Columns
COSMOSIL 15C18-AR-II 15 µm HPLC Columns

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