Syringe Filters

High quality and cost effective syringe filters are available in a broad range of membrane materials with sterile and non-sterile packaging options.

Universal Features:

• HPLC Certified
• Disposable
• Luer-Lok™ and pressure fitting
• Ultrasonically bonded for reliability
• Filter media type clearly inscribed on barrel
• Excellent unit-to-unit and lot-to-lot reproducibility and consistency
• High purity virgin polypropylene housing, no dyes or pigments added
• Every unit type is available as an individually wrapped gamma sterilized pack
• Unique concentric funnel shaped barrel increases volume and decreases back pressure

Specific Features for each type:

Cellulose acetate (CA) - Hydrophilic

• Very low binding capacity for proteins.
• Material is nitrate-free making it suitable for groundwater & EPA ASTM’s.
• For filtration under sterile conditions
• Filtration and clarification of biological fluids, sterilization of media additives and serum
• Sample preparation of aqueous solutions
• For applications requiring maximum sample recovery
• Sample preparation of protein-based HPLC solutions
• Designed to sterilize and remove particulates from even the most viscous proteinaceous samples
• Filtration of tissues culture media with glass fiber prefilter

Glass Fiber Prefilters

• For viscose solutions or for turbid liquids
• Glass microfiber prefilter raises absorption capacity and loading
• Ideal for use as a prefilter in series with other syringe filters
• Glass microfiber filter media enclosed in this series is binderless 1.0µm retention
• Reduces clogging of the membrane, so ideal as a prefilter to increase throughput and flow rate
• Ideal for dissolution testing and general filtration
• Applicable to all membrane types, allowing higher flow rates
• Good compatibility with strong acids, bases and organic solvents
• Similar in composition to I.W. Tremont binderless borosilicate glass microfiber media available as disks and sheets

Mixed Cellulose Esters (MCE) - Hydrophilic

• This membrane is recommended for all filtrations in aqueous or polar media, bacteria filtration
• Ideal when maximum protein recovery in filtrate is crucial
• Used for filtration and inspection of gas, oil and alcohol particulate and bacteria
• Combined with glass microfiber prefilter, ideal for tissue culture media and sensitive biological samples
• Sample filtration - prefilter increases yield

Polyamide/Nylon (PA) - Hydrophilic

• Hydrophilic material; it is recommended for filtration of aqueous or organic/aqueous medium polar liquids.
• Commonly used for general laboratory filtration and filtration of HPLC and GC samples prior to injection
• Filtration of aqueous and organic-aqueous polar medium liquids
• Dissolution sample analysis
• Suitable for use with high pH samples
• Since it binds proteins it is NOT suitable for protein recovery applications
• With microfiber prefilter higher absorption capacity for contamination

Polyethersulfone (PES) - Hydrophilic

• High filtration flow rates
• An inherently low affinity for proteins.
• Low extractables
• Introduction of additives into tissue culture vessel.
• Certified for Ion Chromatography
• Final filtration of bacteriophage and infusion solutions
• Tissue culture, proteins, buffer and nucleic acids filtration
• Ideal for applications requiring maximum sample recovery
• Filter hybridization solutions and probe to reduce backgrounds
• Food, beverages and ultra pure water final filtration
• Sterile product individually blister packed

Polypropylene (PP)

• The polypropylene membrane is resistant to many organic solvents and slightly hydrophobic
• Useful for aqueous and organic solutions
• Low non-specific protein binding

Polytetrafluoroethylene (PTFE) - Hydrophilic or Hydrophobic

• PTFE membranes are inherently hydrophobic; they are ideal for the filtration of nonpolar liquids and gases.
• Very resistant to solvents as well as acids or bases.
• Can be made more hydrophilic by flushing with alcohol, followed by water
• Used for filtering and de-gassing chromatography solvents
• Permits optimal utilization of small sample volumes
• Excellent chemical compatibility for filtering harsh chemicals that destroy other membrane materials
• Moisture barrier for venting applications and vacuum pump line protection
• Ideal for aerosol sampling
• Filter viscous organic based HPLC samples
• After pre-wetting with alcohol, may be used for fine particle removal of aqueous and mild organic solutions in Ion Chromatography

Polyvinylidene difluoride (PVDF) – Hydrophobic

• This membrane features a stability and hydrophobic interactions similar to PTFE.
• Recommended especially for filtration of water-soluble oligomers and polymers, e.g. protein solutions.
• Can also be used for the filtration of hydrophobic substances in different organic solvents.