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The attributes of microparticulate silica as a chromatography support fill the HPLC literature, and large particle, silica-based sorbents have been the mainstay of SPE since the first cartridge was commercialized. Speedisk silica columns combine both traditions by offering microparticulate silica in an SPE column. And it's made by the unique bed support system which characterizes Speedisk design.
|Description||Functional Mode||General Applications|
|Octadecyl C18||RP||Non-ionic, non-polar to moderately polar analytes|
|Octadecyl LightLoad C18||RP||Non-ionic, non-polar to polar analytes|
|Octadecyl PolarPlus C18||RP||Non-ionic, basic, non-polar to polar analytes|
|Octyl C8||RP||Non-ionic, non-polar to moderately polar analytes|
|Phenyl C6H5||NP||Polar from non-polar/polar solvents |
using hydrogen bonding like mechanisms
|Silica||NP||Separate polar from non-polar solvents|
|Amino NH2||NP||Lipids (fatty acids, cholesterol)|
|Quaternary Amine N||Anion Exchange (strong)||Ionic, acidic analytes|
|Aromatic Sulfonic Acid||Cation Exchange(strong)||Ionic, basic analytes|
|Carboxylic Acid||Cation Exchange(weak)||Ionic, basic analytes|
|narc-2||-||Hydrophobic/basic analytes (Cocaine, Benzoylecgonine)|