by Welch Materials
LP is abbreviation for Low pH. LP phases are designed for use at low pH condition. LP phase consists of two very bulky hydrophobic protective groups to prevent siloxane bond from hydrolysis at low pH condition. So the LP column is extremely stable in very low pH mobile phase and at high temperature, even at the lowest pH 1.0, making it the most stable C18 for low pH application in the market. Because LP phase is not endcapped and has more surface silanols, LP phase has more retention for some early eluted polar compounds, and provides some different selectivity than traditional C18. LP-C18 is the most polar C18 among all the C18 products of Welch.
| Vendor | Welch Materials | Pore size | 120 |
| Brand | Ultisil LP-C8 | Surface Area | 320 |
| Modifification | Silica/C8 | Carbon Load, % | 5.5 |
| Mode | Reversed-Phase | Endcapped | No |
| Particle Size | pH stability from | 1.0 | |
| Length | pH stability to | 8.0 | |
| Internal Diameter |
| Vendor | Brand | Mode | Modification | Int. diam. | Length | Particles | Pores | Price |
|---|---|---|---|---|---|---|---|---|
| KNAUER | Eurospher II | Reversed-Phase | Silica/C8 | 3.0 mm | 150 mm | 10.0 μm | 100 Å | On request |
| Dikma Technologies Inc. | Bio-Bond C8 | Reversed-Phase | Silica/C8 | 4.6 mm | 250 mm | 3.0 μm | 300 Å | 621.00 |
| SiliCYCLE | SiliaChrom XDB1 C8 | Reversed-Phase | Silica/C8 | 2.1 mm | 30 mm | 5.0 μm | 100 Å | On request |
| SGE Analytical Science | ProteCol C8 H (Stainless Steel) | Reversed-Phase | Silica/C8 | 3.0 mm | 150 mm | 3.0 μm | 1000 Å | On request |
| Agilent Technologies | ZORBAX Eclipse XDB | Reversed-Phase | Silica/C8 | 2.0 mm | 100 mm | 3.5 μm | 80 Å | On request |
| ES Industries | Chromegabond 60 MC-8 | Reversed-Phase | Silica/C8 | 4.6 mm | 100 mm | 3.0 μm | 60 Å | On request |
| Phenomenex | Luna C8(2) | Reversed-Phase | Silica/C8 | 2.0 mm | 50 mm | 5.0 μm | 100 Å | On request |
| ACE | ACE C8-300 | Reversed-Phase | Silica/C8 | 1.0 mm | 75 mm | 5.0 μm | 300 Å | On request |
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