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 Polar-RP | Internal Diameter | |
| Modifification | Hybrid silica-polymer/Polar | Surface Area | 320 |
| Mode | Reversed-Phase | pH stability from | 1.0 |
| Particle Size | pH stability to | 12.5 |
| Vendor | Brand | Mode | Modification | Int. diam. | Length | Particles | Pores | Price |
|---|---|---|---|---|---|---|---|---|
| Welch Materials | Xtimate Polar-RP | Reversed-Phase | Hybrid silica-polymer/Polar | 3.0 mm | 300 mm | 3.0 μm | — | On request |
| Welch Materials | Xtimate Polar-RP | Reversed-Phase | Hybrid silica-polymer/Polar | 4.6 mm | 50 mm | 5.0 μm | — | On request |
| Welch Materials | Xtimate Polar-RP | Reversed-Phase | Hybrid silica-polymer/Polar | 2.1 mm | 30 mm | 5.0 μm | — | On request |
| Welch Materials | Xtimate Polar-RP | Reversed-Phase | Hybrid silica-polymer/Polar | 3.0 mm | 200 mm | 5.0 μm | — | On request |
| Welch Materials | Xtimate Polar-RP | Reversed-Phase | Hybrid silica-polymer/Polar | 4.0 mm | 200 mm | 3.0 μm | — | On request |
| Welch Materials | Xtimate Polar-RP | Reversed-Phase | Hybrid silica-polymer/Polar | 4.6 mm | 200 mm | 3.0 μm | — | On request |
| Welch Materials | Xtimate Polar-RP | Reversed-Phase | Hybrid silica-polymer/Polar | 4.0 mm | 150 mm | 3.0 μm | — | On request |
| Welch Materials | Xtimate Polar-RP | Reversed-Phase | Hybrid silica-polymer/Polar | 3.0 mm | 100 mm | 5.0 μm | — | On request |
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