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COSMOSIL 5C8-MS

Cosmosil 5C8-MS alkyl-chained columns use packing material which combine alkyl chains (except C18) such as C8 (octyl), C4 (buty) and TMS (trimethyl). As the length of  alkyl chain becomes shorter, the hydrophobic interaction becomes weaker.
Owing to the ultra end-capping treatment with very low levels of free silanol as in the case of C18  columns, COSMOSIL alkyl-chained columns can be used widely for the general analysis of compounds including those for which C18 columns produce long retention times.

MATERIAL CHARACTERISTICS

COSMOSIL 5C8-MS
Silica gel
high purity porous spherical silica gel
Average particle size
5µm
Average pore size
approx. 120Å
Specific surface area
approx. 300m²/g
Stationary phase
octyl group
End capping treatment
near-perfect treatment
Carbon content
approx. 10%

BEHAVIOR OF POLAR COMPOUNDS

For the analysis of non-polar compounds such as benezene and toluene, the column shows weaker retention as the length of alkyl-chain become shorter. This retention increases for polar compounds such as acetophenone and
ethylbezoate.

 

Catalog # Cosmosil 5C8-MS Column Price ($U.S.) -
093-8153 5C8-MS - Analytical Column, 4.6.x 50 $319.00
093-8154 5C8-MS - Analytical Column, 4.6 x 100 mm $381.00
093-8155 5C8-MS - Analytical Column, 4.6 x 150 mm $4,250.00
093-8156 5C8-MS - Analytical Column, 4.6 x 250 mm $505.00
093-8159 5C8-MS - Preparative Column,10 x 250 mm $1,020.00
093-8160 5C8-MS - Preparative Column, 20 x 250 mm $1,957.00
093-8151 5C8-MS - Analytical Guard Column, 4.6 x 10.0 mm $309.00
093-8152 5C8-MS - Semi-preparative Guard Column, 10 x 20 mm $525.00

 

 

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