-
Shape selectivity provided by polymerically bonded C18
Densely bonded C18 provides shape selectivity. Inertsil ODS-P has increased retentivity for planar structural compounds.
In the analyses shown below, Inertsil ODS-P elutes those analytes in order of planarity. More planar molecules are retained longer than non-planar molecules. Inertsil ODS-2 and Inertsil ODS-3, modified to bond with C18 less densely, show different selectivities.
Inertsil ODS-P achieves better separation of structurally similar compounds because of planarity recognition capability provided by densely bonded C18. As an expample, separation of vitamin D2 and vitamin D3 using Inertsil ODS-P and Inertsil ODS-3 are shown below.
Shape selectivity of Inertsil ODS-P is enhanced below temperature 30 °C.
Particle Size |
Particle Shape |
Surface Area |
Pore Size |
Pore Volume |
Bonded Group |
End-Capping |
Carbon Load |
pH Range |
3 µm |
Spherical |
450 m2/g |
100Å |
1.05 mL/g |
Octadecyl Groups |
No |
29% |
2 - 7.5 |
5 µm |
Inertsil® ODS-P Columns List
Separation of 16 PAHs including isomers on Inertsil ODS-P using a gradient of methanol/water.
Separation of 3 isomers of Terphenyl using Inertsil ODS columns. o- and m-terphenyl isomers have non-planar structures, whereas p-terphenyl has a planar structure. In the polymeric phase, planar molecules are retained longer than non-planar ones.
Separation of Xylene isomers on Inertsil ODS-3 and Inertsil ODS-P. Better separation was achieved on Inertsil ODS-P.
Separation of Carotenoids using Inertsil ODS-3 and Inertsil ODS-P.
Separation of Toad Venom using Inertsil ODS-3 and Inertsil ODS-P