by Welch Materials
Our Ultisil Amino Acid HPLC columns are made from spherical, totally porous, and ultra high purity (>99.999%) type B silica particles. Our proprietary surface modification before bonding generates a very smooth and uniform surface with less acidic surface silanol. Ultisil Amino Acid columns provide the best performance in peak shape, effi ciency and resolution for the analysis of 18 amino acids. Total sample preparing time can be achieved in as little as 30 min.
| Vendor | Welch Materials | Length | |
| Brand | Ultisil Amino Acid | Internal Diameter | |
| Mode | Reversed-Phase | Pore size | 120 |
| Particle Size |
| Vendor | Brand | Mode | Modification | Int. diam. | Length | Particles | Pores | Price |
|---|---|---|---|---|---|---|---|---|
| Higgins Analytical | CLIPEUS CN | Reversed-Phase | Silica/CN | 0.5 mm | 30 mm | 5.0 μm | 120 Å | On request |
| Phenomenex | Synergi Polar-RP | Reversed-Phase | Silica/ Ether-linked phenyl | 21.0 mm | 250 mm | 4.0 μm | 80 Å | On request |
| Princeton Chromatography Inc. | PrincetonSPHER OMNI C18-100 | Reversed-Phase | Silica/C18 | 4.6 mm | 250 mm | 5.0 μm | 100 Å | On request |
| Welch Materials | Xtimate C4 | Reversed-Phase | Hybrid silica-polymer/C4 | 4.6 mm | 30 mm | 3.0 μm | — | On request |
| MACHEREY-NAGEL | NUCLEODUR Phenyl-Hexyl | Reversed-Phase | Silica/ Phenyl-Hexyl | 10.0 mm | 250 mm | 5.0 μm | 110 Å | On request |
| Chromenta | Chromenta KB Phenyl | Reversed-Phase | Silica/Phenyl | 2.1 mm | 150 mm | 3.0 μm | 120 Å | On request |
| Teknokroma | Hyperpack ODS | Reversed-Phase | Silica/C18 | 4.0 mm | 30 mm | 5.0 μm | — | On request |
| Welch Materials | Ultisil AQ-C18 | Reversed-Phase | Silica/C18 | 3.0 mm | 100 mm | 5.0 μm | 120 Å | On request |
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