Sterile Syringe Filter Membrane (25mm×0.22μm Water PES, Pack of 100, Individual Pack)
Sterile, individually packed syringe filter designed for laboratory sample preparation with PES (polyethersulfone, hydrophilic) membrane. This SKU combines a 25 mm housing and 0.22μm pore size, supplied as a pack of 100 sterile filters.
The sterile housing and individual blister-style packaging help protect sensitive biological samples from environmental contamination and cross-contamination between runs.
Membrane material and performance:
- Membrane type: PES (polyethersulfone, hydrophilic).
- Characteristics: High porosity and uniform pores, intrinsically hydrophilic with very low protein and drug adsorption; fast flow even with viscous buffers.
- Best suited for: Biological and protein-containing samples, culture media, serums and buffers used in biopharmaceutical and cosmetic R&D.
- Recommended maximum filtration temperature: 100°C.
Diameter, flow area and sample volume:
- This product: 25 mm diameter (effective area ≈ 3.9 cm²), typical working sample volume 10–100 mL per filtration.
- All diameters in this sterile series share very low residual (hold-up) volume (≤0.1 mL) and a robust PP housing rated to ≥6.9 bar burst pressure.
Pore size selection:
- 0.22μm on this SKU: Final sterilizing or bioburden-reducing filtration; removal of bacteria and fine particles before analysis or filling.
- 0.45μm sterile options in the same series: Clarification and removal of visible particulates or precipitates where full sterilizing-grade filtration is not required.
Housing and flow table:
| Filter diameter | Effective area | Residual volume | Typical sample volume | Housing material |
|---|
| 13 mm | 0.8 cm² | ≤0.1 mL | 2–10 mL | PP housing |
| 25 mm | 3.9 cm² | ≤0.1 mL | 10–100 mL | PP housing |
| 33 mm | 4.5 cm² | ≤0.1 mL | 50–300 mL | PP housing |
Membrane and packaging comparison (sterile PES):
| Membrane material | Key characteristics | Best suited for |
|---|
| PES (polyethersulfone, hydrophilic) | High porosity and uniform pores, intrinsically hydrophilic with very low protein and drug adsorption; fast flow even with viscous buffers. Sterile, individually packed syringe filters help minimize secondary contamination between samples. | Biological and protein-containing samples, culture media, serums and buffers used in biopharmaceutical and cosmetic R&D. |
Typical applications:
- Sterile filtration of culture media, buffers and protein-containing solutions before cell culture or bioassay.
- Sample preparation for biopharmaceutical and cosmetic R&D where low protein binding and controlled bioburden are required.
- Protection of sterile systems, columns and analytical instruments from particles and microorganisms.
