Reprospher 200 SAX is a strong anion exchange (SAX) column from Dr. Maisch HPLC GmbH, based on high-purity, fully porous silica with a 200 Å pore size and functionalized with quaternary ammonium groups. The wide-pore design allows efficient mass transfer and accessibility for large or structurally complex analytes such as nucleotides, organic acids, and acidic biomolecules. Thanks to its strong ion-exchange capacity and selectivity for negatively charged species, this phase is especially well suited for pharmaceutical, environmental, and biochemical applications.
This SAX phase with wide-pore support from Dr. Maisch HPLC GmbH delivers robust ion-exchange performance and high resolution – ideal for demanding separations of negatively charged molecules in HPLC.
Quaternary ammonium bonded SAX phase – USP L14 classification
Fully porous, high-purity silica with 200 Å pore size
High retention for strongly acidic and anionic compounds
Stable performance in ion-exchange and salt-gradient applications
Available from 3 µm to 50 µm particle sizes
Organic acids, nucleotides, and phosphorylated compounds
Ion-exchange separations in pharmaceutical QC and bioanalysis
LC methods requiring strong retention of anionic species
Preparative or semi-preparative workflows with acidic analytes
| Particle Sizes |
|
|---|---|
| Pore Size | 200 Å |
| Surface Area | 160 m²/g |
| Phase/Modification | SAX |
| Particle Type | |
| Separation Mode | |
| Endcapping | No |
| Carbonload | 7 % |
| pH Range | 2 to 8 |
| Phase | Material Number |
|---|---|
| Reprospher 200 SAX, 3 µm | rs23.sax. |
| Reprospher 200 SAX, 5 µm | rs25.sax. |
| Reprospher 200 SAX, 10 µm | rs20.sax. |
| Reprospher 200 SAX, 30 µm | rs230.sax. |
| Reprospher 200 SAX, 50 µm | rs250.sax. |