Reprospher 100 PEI is an HPLC column from Dr. Maisch HPLC GmbH, packed with ultra-pure, fully porous spherical silica functionalized with polyethyleneimine, a polyamine coating that provides weak anion exchange (WAX) properties. This stationary phase offers high capacity for retaining and separating acidic and negatively charged analytes, while also enabling polar interaction chromatography. The dense polyamine surface ensures strong ionic retention under a wide range of pH conditions, making Reprospher 100 PEI suitable for ion-exchange, mixed-mode, and certain HILIC-like separations.
Reprospher 100 PEI from Dr. Maisch HPLC GmbH delivers weak anion exchange capacity and versatile polar selectivity – ideal for laboratories requiring high-capacity WAX and mixed-mode performance.
Polyamine-bonded silica – weak anion exchange (WAX) selectivity
High capacity for acidic and anionic compounds
Fully porous, high-purity 100 Å spherical silica
Suitable for aqueous buffer systems and mixed-mode separations
Manufactured and quality-controlled by Dr. Maisch HPLC GmbH
Available from 3 µm to 30 µm particle sizes
Strong anion exchange chromatography of nucleotides and organic acids
Separation of negatively charged biomolecules and metabolites
Mixed-mode LC for complex sample matrices
Method development for polar and acidic analytes
| Particle Sizes |
|
|---|---|
| Pore Size | 100 Å |
| Surface Area | 350 m²/g |
| Phase/Modification | PEI |
| Particle Type | |
| Separation Modes | |
| Endcapping | No |
| Carbonload | 13 % |
| pH Range | 2 to 8 |
| Phase | Material Number |
|---|---|
| Reprospher 100 PEI, 3 µm | rs13.pei. |
| Reprospher 100 PEI, 5 µm | rs15.pei. |
| Reprospher 100 PEI, 10 µm | rs10.pei. |
| Reprospher 100 PEI, 30 µm | rs130.pei. |
| Reprospher 100 PEI, 50 µm | rs150.pei. |