Ultrasep ES 100 RP8e is a silica-based HPLC column with a 100 Å pore size and an endcapped octyl (C8) bonded phase. The endcapping process minimizes residual silanol activity, ensuring improved peak symmetry and enhanced reproducibility, especially for basic and polar analytes.
With its moderate hydrophobic retention and faster elution compared to C18 phases, RP8e is an excellent choice for analytes that are strongly retained on longer alkyl chains, while still maintaining high efficiency and column stability.
Ultrasep ES 100 RP8e combines balanced hydrophobic retention, reduced silanol interactions, and reproducible performance – the reliable choice for robust reversed-phase HPLC separations.
Silica-based stationary phase with 100 Å pore size
Endcapped octyl (C8) bonded phase – USP L7 classification
Balanced hydrophobic retention with reduced silanol activity
Improved peak shapes for polar and basic compounds
High reproducibility and column durability
Available particle sizes: 3 µm, 5 µm
Pharmaceutical impurity profiling and drug analysis
Separation of polar and basic analytes with sharp peak shapes
Environmental and food testing of moderately hydrophobic compounds
Method development requiring balanced retention and reproducibility
| Particle Sizes |
|
|---|---|
| Pore Size | 100 Å |
| Particle Type | |
| Separation Mode | |
| USP Code | |
| Endcapping | Yes |
| pH Range | 2 - 8 |
| Phase | Material Number |
|---|---|
| Ultrasep ES 100 RP8e, 3 µm | u13.8e. |
| Ultrasep ES 100 RP8e, 5 µm | u15.8e. |