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Welchrom
Welchrom® HPLC columns are manufactured by Welch Materials Inc., located in Shanghai, China. The phases are based on high-purity spherical silica gel, which is available in two different reversed-phase modifications. Due to a new bonding and endcapping technique, Welchrom® columns show symmetrical peak shape and low back pressure.
Technical Data
| Phase-Name | Modification | Particle Size | Pore Size | End-capping | C-Content | USP | Surface | pH-Range | Tmax |
| Welchrom® XB-C18 | C18 | 5 µm | 120 Å | + | 17% | N/A | 320 m2/g | 1.5‒10.0 | N/A |
| Welchrom® XB-C8 | C8 | 5 µm | 120 Å | + | 11% | N/A | 320 m2/g | 1.5‒10.0 | N/A |
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