Achieving absolute particle retention and sterility requires high-precision surface filtration media. LabFriend provides an extensive selection of membrane filters, located within the filtration section of our distillation, separation, and filtration department. These professional-grade membranes are engineered for critical analytical applications, from microbiological monitoring to HPLC mobile phase clarification.
Why Choose Professional Membrane Filters?
Our curated collection of membrane media is designed for uniform pore structure, high flow rates, and specific chemical compatibility:
- Sterile Cellulose Acetate (CA): We stock Sartorius Cellulose Acetate Membranes (0.2 µm and 0.45 µm), offering very low non-specific binding, making them ideal for aqueous solutions and biological samples.
- High-Throughput Cellulose Nitrate (CN): Utilize Sartorius Cellulose Nitrate Membranes (50 mm and 47 mm), the standard for colony counting and general aqueous filtration due to their high non-specific adsorption.
- Durable Polyamide (Nylon): Explore Sartorius Polyamide Membranes, featuring excellent chemical resistance to alkaline solutions and organic solvents, perfect for solvent degassing.
- Standardized Formats: Our range includes industry-standard 25 mm, 47 mm, and 50 mm diameters to ensure compatibility with all standard filter holders and manifolds.
LabFriend supplies membrane filters from the world's leading specialist in separation technology:
- Sartorius: A global pioneer in laboratory filtration, providing premium cellulose acetate, cellulose nitrate, and polyamide membranes for demanding research and industrial workflows.
The correct membrane ensures the integrity of your results; to further complete your filtration or distillation assembly, we recommend exploring these related categories:
- Filtration Apparatus: Pair your membranes with LLG-filter holders or DWK Duran glass sieve plates for efficient vacuum-assisted separation.
- Glass Fiber Filters: Use Sartorius microfibre discs as pre-filters to prevent premature membrane clogging when processing high-particle-load samples.
- In-Line Filters: Protect your vacuum source using Sartorius air filtration units with hydrophobic PTFE membranes.
- Microfilter Plates: For high-throughput automated workflows, utilize AHN Biotechnologie 96-well filter plates.
Unsure if cellulose acetate or polyamide is best for your specific solvent-based synthesis? Our team provides local technical support to help you find the perfect analytical solution with fast shipping and competitive pricing.
Frequently Asked Questions
1. When should I choose Cellulose Acetate (CA) over Cellulose Nitrate (CN)?
CA membranes are best for filtering protein-containing liquids due to their extremely low protein binding. CN membranes are generally used for microbiological testing and aqueous filtration where protein recovery is not a priority.
2. Are these membrane filters autoclavable?
Most Sartorius CA and CN membranes can be sterilized via autoclaving at 121°C, but always check the specific product documentation for temperature limits and recommended sterilization methods.
3. What is the benefit of Polyamide (Nylon) membranes?
Polyamide membranes offer broad chemical compatibility with many organic solvents and alkaline solutions, making them more versatile than cellulose-based membranes for complex chemical mixtures.
4. How do I choose between a 0.2 µm and 0.45 µm pore size?
A 0.2 µm pore size is typically used for cold sterilization (removing bacteria), while 0.45 µm is standard for general clarifying and removing fine particulates from samples before analysis.
