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COSMOSIL 5TMS-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 5TMS-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
trimethyl group
End capping treatment
near-perfect treatment
Carbon content
approx. 5%

BEHAVIOR OF POLAR COMPOUNDS

For the analysis of non-polar compounds such as benzene and toluene, the column shows weaker retention as the length of alkyl chain becomes shorter.
The retention increases for polar compounds such as acetophenone and methyl benzoate.


Catalog # Cosmosil 5TMS-MS Column Price ($U.S.) -
093-8173 5TMS-MS - Analytical Column, 4.6 x 50 mm $319.00
093-8174 5TMS-MS - Analytical Column, 4.6 x 100 mm $381.00
093-8175 5TMS-MS - Analytical Column, 4.6 x150 mm $494.00
093-8176 5TMS-MS - Analytical Column, 4.6 x 250 mm $505.00
093-8177 5TMS-MS - Semi-preparative Column, 6 x150 mm $453.00
093-8178 5TMS-MS - Semi-preparative Column, 6 x 250 mm $628.00
093-8179 5TMS-MS - Preparative Column,10 x 250 mm $1,020.00
093-8180 5TMS-MS - Preparative Column, 20 x 250 mm $1,957.00
093-8171 5TMS-MS - Analytical Guard Column, 4.6 x 10.0 mm $309.00
093-8172 5TMS-MS - Semi-preparative Guard Column, 10 x 20 mm $525.00

 

 

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