Waters, 186003977, ACQUITY UPLC BEH Shield RP18 VanGuard Pre-column, 130Å, 1.7 µm, 2.1 mm X 5 mm, 3/pk
Catalog Number: 186003977
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Category
Pack Size3/pk
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| Chemistry | C18 |
|---|---|
| Separation Mode | Reversed Phase |
| Particle Substrate | Hybrid |
| pH Range Min | 2 pH |
| pH Range Max | 12 pH |
| Maximum Pressure | 18000 psi (1240 Bar) |
| Endcapped | Yes |
| Bonding Technology | Shield RP18 |
| Silanol Activity | Low |
| Particle Shape | Spherical |
| Particle Size | 1.7 µm |
| Endfitting Type | Direct-Connect |
| Pore Size | 130 Å |
| Format | VanGuard Pre-column |
| Surface Area | 185 |
| System | UPLC, UHPLC |
| Particle Technology | BEH |
| USP Classification | L1 |
| Inner Diameter | 2.1 mm |
| Length | 5 mm |
| Carbon Load | 17 % |
| UNSPSC | 41115709 |
| Brand | ACQUITY UPLC |
| Product Type | Guards |
| Units per Package | 3 pk |
Answer:An embedded carbamate group in the bonded ligand adds polar interactions and can change selectivity, notably for phenolic analytes.
Answer:The 5 × 2.1 mm pre-column attaches directly to a compatible ACQUITY UPLC column inlet.
Answer:The pack contains three 1.7 µm, 130 Å BEH Shield RP18 VanGuard pre-columns, not an analytical column.
Waters ACQUITY UPLC BEH Shield RP18 VanGuard pre-columns protect matching analytical columns using an endcapped, embedded-polar C18 phase. Each direct-connect guard contains a 5 × 2.1 mm bed of 1.7 µm, 130 Å BEH particles. An embedded carbamate group changes reversed-phase selectivity relative to straight-chain C18 ligands and is useful for method development with phenolic compounds. The direct inlet connection minimizes extra-column volume and unnecessary fittings while intercepting contamination ahead of the analytical bed. The guard is specified for pH 2–12 and up to 18,000 psi (1,240 bar). Three pre-columns are supplied.
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