by Welch Materials
Xtimate is the brand-name for Welch premium HPLC column series. There are two types of Xtimate column, those based on based on Hybride Silica Polymer packing materials, and those based on pure polymer materials.
| Vendor | Welch Materials | Length | |
| Brand | Xtimate NH2 | Internal Diameter | |
| Modifification | Hybrid silica-polymer/NH2 | pH stability from | 1.0 |
| Mode | Reversed-Phase | pH stability to | 12.5 |
| Particle Size | Product usage | Basic compounds |
| Vendor | Brand | Mode | Modification | Int. diam. | Length | Particles | Pores | Price |
|---|---|---|---|---|---|---|---|---|
| Welch Materials | Xtimate NH2 | Reversed-Phase | Hybrid silica-polymer/NH2 | 4.0 mm | 100 mm | 3.0 μm | — | On request |
| Welch Materials | Xtimate NH2 | Reversed-Phase | Hybrid silica-polymer/NH2 | 4.0 mm | 50 mm | 5.0 μm | — | On request |
| Welch Materials | Xtimate NH2 | Reversed-Phase | Hybrid silica-polymer/NH2 | 4.0 mm | 250 mm | 3.0 μm | — | On request |
| Welch Materials | Xtimate NH2 | Reversed-Phase | Hybrid silica-polymer/NH2 | 2.1 mm | 200 mm | 3.0 μm | — | On request |
| Welch Materials | Xtimate NH2 | Reversed-Phase | Hybrid silica-polymer/NH2 | 3.0 mm | 50 mm | 3.0 μm | — | On request |
| Welch Materials | Xtimate NH2 | Reversed-Phase | Hybrid silica-polymer/NH2 | 4.0 mm | 150 mm | 5.0 μm | — | On request |
| Welch Materials | Xtimate NH2 | Reversed-Phase | Hybrid silica-polymer/NH2 | 4.0 mm | 200 mm | 3.0 μm | — | On request |
| Welch Materials | Xtimate NH2 | Reversed-Phase | Hybrid silica-polymer/NH2 | 21.2 mm | 250 mm | 10.0 μm | — | On request |
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