by Merck
Purospher® RP-18 (5 µm) LiChroCART® 125-4
Purospher® RP-18 is designed for the separation of problematic basic compounds with simple neutral eluents. In addition Purospher® RP-18 allows the separation of hydrophilic compounds with aqueous mobile phase. Purospher® RP-18 is based upon a high-purity, metal free silica. The multi-step chemical modification and deactivation of the surface enables a peak-tailing free elution of basic and chelating compounds. Purospher® RP-18 is not suitable for the separation of acidic compounds. The good chemical stability of Purospher® RP-18 enables the use of mobile phase conditions at pH 8.
| Vendor | Merck | Max Pressure | 6000 |
| Brand | Purospher® | Surface Area | 480 |
| Modifification | Silica/C18 | Carbon Load, % | 17.0 |
| Mode | Reversed-Phase | Endcapped | Yes |
| Particle Size | Operating Temperature | 60 | |
| Length | pH stability from | 2.0 | |
| Internal Diameter | pH stability to | 8.0 | |
| Pore size | 90 |
| Vendor | Brand | Mode | Modification | Int. diam. | Length | Particles | Pores | Price |
|---|---|---|---|---|---|---|---|---|
| CHEMINDIA | CHEMSIL-ODS-C18 | Reversed-Phase | Silica/C18 | 4.6 mm | 35 mm | 5.0 μm | 100 Å | On request |
| GRACE | Vydac TP C18 | Reversed-Phase | Silica/C18 | 4.6 mm | 100 mm | 5.0 μm | 300 Å | On request |
| Unimicro Technologies Inc. | Globalsil-120-5-ODS-AP | Reversed-Phase | Silica/C18 | 4.6 mm | 200 mm | 5.0 μm | 120 Å | On request |
| BISCHOFF | ProntoSIL 200-5-C18 ace-EPS | Reversed-Phase | Silica/C18 | 3.0 mm | 100 mm | 5.0 μm | 200 Å | On request |
| GL Sciences | Inertsil ODS-4 | Reversed-Phase | Silica/C18 | 4.6 mm | 30 mm | 3.0 μm | 100 Å | On request |
| BISCHOFF | ProntoSIL 120-5-C18 ace-EPS | Reversed-Phase | Silica/C18 | 2.0 mm | 100 mm | 5.0 μm | 120 Å | On request |
| Varian | Pursuit C18 (ChromSep) | Reversed-Phase | Silica/C18 | 3.0 mm | 150 mm | 5.0 μm | 200 Å | On request |
| RSTech | HECTOR-A C18 | Reversed-Phase | Silica/C18 | 3.0 mm | 70 mm | 5.0 μm | 100 Å | On request |
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