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.
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MATERIAL CHARACTERISTICS
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COSMOSIL 5C8-MS
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Silica gel
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high purity porous spherical silica gel
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Average particle size
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5µm
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Average pore size
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approx. 120Å
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Specific surface area
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approx. 300m²/g
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Stationary phase
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octyl group
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End capping treatment
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near-perfect treatment
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Carbon content
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approx. 10%
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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.
ethylbezoate.
Cosmosil 5C8-MS Column
| Item | Catalog | Price ($U.S.) | Buy |
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| 5C8-MS – Preparative Column, 20 x 250 mm | 093-8160 | $1,957.00 | Add to cart |
| 5C8-MS – Semi-preparative Guard Column, 10 x 20 mm | 093-8152 | $525.00 | Add to cart |
| 5C8-MS – Preparative Column,10 x 250 mm | 093-8159 | $1,020.00 | Add to cart |
| 5C8-MS – Analytical Column, 4.6 x 150 mm | 093-8155 | $402.00 | Add to cart |
| 5C8-MS – Analytical Column, 4.6 x 100 mm | 093-8154 | $381.00 | Add to cart |
| 5C8-MS – Analytical Column, 4.6 x 250 mm | 093-8156 | $505.00 | Add to cart |
| 5C8-MS – Analytical Column, 4.6.x 50 | 093-8153 | $319.00 | Add to cart |
| 5C8-MS – Analytical Guard Column, 4.6 x 10.0 mm | 093-8151 | $309.00 | Add to cart |