Ultisil® XB-Phenyl-Different Selectivity to Alkyl Phase
Ultisil® XB-Phenyl phase is less retentive than conventional C18 or C8 phases, but more retentive than standard cyano
phase. Due to their ability to participate in π-π interactions, XB-Phenyl columns may actually be more retentive than C18
or C8 columns towards certain polar aromatic compounds, depending on running conditions. The selectivity for highly
polar aromatics, which are poorly retained on alkyl-bonded phases, together with reduced retentivity towards non-polar
compounds, make XB-Phenyl an excellent choice for the analysis of complex mixtures of polar and non-polar analytes.
Additionally, this bonding phase boasts high surface coverage and exhaustive double end-capping, leading to better
performance.
Ultisil® XB-Phenyl
| Structural Formula |  |
| pH Range | 2.0-8.0 |
| Particle Size | 3μm, 5μm, 10μm |
| Surface Area(m²/g) | 320(120Å), 90(300Å) |
| Carbon Loading(%) | 12(120Å), 4(300Å) |
| USP List | L11 |
| Endcapped | Yes |
Unique Selectivity for Aromatic Compounds of Ultisil® XB-Phenyl Phase
| Column: | 4.6×150mm, 5μm |
| Mobile Phase: | Methanol/ water=70/30 |
| Flow rate: | 1.0mL/min |
| Detector: | 254nm |
| Temperature: | 24°C |
| Samples: | 1) Uracil 2) Phenol 3) Paranitrotoluene 4) Toluene |
Moxifloxacin Hydrochloride
| Column: | Ultisil® XB-Phenyl, 4.6×250mm, 5μm |
| Mobile Phase: | [0.5g TBAHS, 1g KH2PO4, 3.4g(2mL) H3PO4, 1000mL water]/methanol=72/28 |
| Flow rate: | 1.3mL/min |
| Detector: | 293nm |
| Temperature: | 45°C |
| Samples: | 10μL |
