GromSil 100 NP-1 is a high-purity, fully porous silica column from Dr. Maisch HPLC GmbH, featuring a 100 Å pore size and an unmodified (bare) surface. Designed for traditional normal-phase and adsorption chromatography, this phase provides strong polar interactions through active silanol groups, allowing effective separation of polar, non-derivatized compounds such as isomers, organic acids, and amines.
Its consistent surface activity, mechanical robustness, and high batch-to-batch reproducibility make it a reliable choice for polar separations and orthogonal method development.
This bare silica phase from Dr. Maisch HPLC GmbH provides robust and selective performance — ideal for laboratories applying classical polarity-based separation techniques.
Unmodified silica surface – USP L3 classification
Fully porous silica with 100 Å pore size
Strong polar retention via silanol interactions
Suitable for normal-phase and dry-loading workflows
Available in 3 µm, 5 µm, and 10 µm particle sizes
Isomer separations, sugar derivatives, and polar small molecules
Normal-phase chromatography with non-aqueous eluents
Method development complementary to reversed-phase LC
Adsorption chromatography and sample fractionation
| Particle Sizes |
|
|---|---|
| Pore Size | 100 Å |
| Phase/Modification | Si |
| Particle Type | |
| Separation Modes | |
| USP Code | |
| Endcapping | No |
| pH Range | 2 - 8 |
| Phase | Material Number |
|---|---|
| GromSil 100 NP-1, 3 µm | GSNP10310. |
| GromSil 100 NP-1, 5 µm | GSNP10510. |
| GromSil 100 NP-1, 10 µm | GSNP11010. |