A practical customer guide to chemistry, particle size, dimensions and application requirements.
Consider polarity, ionization, hydrophobicity, molecular size and structural similarity. C18 is the standard starting point for many reversed-phase methods, while C30, aqueous-compatible and specialist phases address more specific selectivity needs.
Smaller particles generally support higher efficiency but require greater system pressure and tighter control of extra-column volume. Conventional 5 µm particles remain widely used for routine HPLC and established methods.
Longer columns can provide more resolving power but increase run time and pressure. Narrow internal diameters reduce solvent use and can improve sensitivity when the LC system is optimized for low dispersion.
Confirm the pressure rating, dwell volume, detector cell volume, tubing dimensions and injection system are suitable for the selected column.
Guard columns are valuable for complex matrices, particulate-prone samples and strongly retained contaminants. They should match the analytical chemistry and be replaced before contamination reaches the main column.
Compare Develosil product families, applications and verified configurations before selecting a column.