| Chemistry | C18 |
|---|---|
| Separation Mode | Reversed Phase |
| Particle Substrate | Silica |
| pH Range Min | 2 pH |
| pH Range Max | 8 pH |
| Maximum Pressure | 6000 psi (415 Bar) |
| Endcapped | Yes |
| Silanol Activity | High |
| Particle Shape | Irregular |
| Particle Size | 10 µm |
| Pore Size | 125 Å |
| Format | Guard-Pak Insert |
| Surface Area | 330 |
| System | HPLC |
| USP Classification | L1 |
| Carbon Load | 10 % |
| UNSPSC | 41115709 |
| Brand | µBondapak |
| Product Type | Guards |
| Units per Package | 10 pk |
Answer:They protect a reversed-phase C18 analytical column from particulates and strongly retained sample components.
Answer:The guard sorbent contains 10 µm silica particles with a 125 Å nominal pore size.
Answer:Each package contains 10 guard inserts; the recommended pH range is 2–8.
µBondapak C18 Guard-Pak inserts protect reversed-phase HPLC analytical columns from strongly retained contaminants and particulate material while preserving the separation chemistry of µBondapak C18 stationary phases. Each replaceable guard insert contains 10 µm irregular silica particles bonded with C18 groups and has a nominal pore size of 125 Å. The sorbent is endcapped, with approximately 10% carbon loading and high silanol activity. A pack contains 10 inserts for use in a compatible Guard-Pak holder. Position the guard assembly upstream of the analytical column, choose a mobile phase suitable for reversed-phase operation, and follow the recommended pH range of 2–8. The specified maximum pressure is 6,000 psi (415 bar), although the lower rating of the installed system or column governs actual operation. Replacing a contaminated insert can restore flow characteristics and reduce unwanted sample carryover without replacing the main column. Match the guard sorbent chemistry to the analytical column before installation.
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