by Agilent Technologies
ZORBAX Extend-C18
Extend-C18 columns incorporate a unique patented bidentate silane, combined with a double-endcapping process that protects the silica from dissolution at high pH - up to pH 11.5. Columns are best applied for separations of compounds that are either (1) basic and have little or no retention at low or intermediate pHs, (2) more stable or more soluble at high pH, or (3) basic and show poor peak shape at low or intermediate pH.
| Vendor | Agilent Technologies | Pore size | 80 |
| Brand | ZORBAX Extend-C18 | Surface Area | 180 |
| Modifification | Silica/C18 | Endcapped | Yes |
| Mode | Reversed-Phase | Operating Temperature | 60 |
| Particle Size | pH stability from | 2.0 | |
| Length | pH stability to | 11.5 | |
| Internal Diameter |
| Vendor | Brand | Mode | Modification | Int. diam. | Length | Particles | Pores | Price |
|---|---|---|---|---|---|---|---|---|
| GRACE | Vydac Everest C18 | Reversed-Phase | Silica/C18 | 0.075 mm | 50 mm | 5.0 μm | 300 Å | On request |
| Higgins Analytical | HAISIL HL C18 | Reversed-Phase | Silica/C18 | 0.8 mm | 250 mm | 5.0 μm | 100 Å | On request |
| Welch Materials | Topsil C18 | Reversed-Phase | Silica/C18 | 3.0 mm | 100 mm | 5.0 μm | 150 Å | On request |
| Princeton Chromatography Inc. | PrincetonSPHER C18-60 | Reversed-Phase | Silica/C18 | 10.0 mm | 150 mm | 10.0 μm | 60 Å | On request |
| Phenomenex | Aqua C18 | Reversed-Phase | Silica/C18 | 2.0 mm | 250 mm | 5.0 μm | 200 Å | On request |
| Luknova | Hyper C18-200 | Reversed-Phase | Silica/C18 | 2.1 mm | 150 mm | 5.0 μm | 200 Å | On request |
| GRACE | Vydac TP C18 | Reversed-Phase | Silica/C18 | 1.0 mm | 250 mm | 5.0 μm | 300 Å | On request |
| ACE | ACE C18 | Reversed-Phase | Silica/C18 | 2.1 mm | 75 mm | 3.0 μm | 100 Å | On request |
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