Membrane Filters | Greyhound Chromatography

NYLON

Features:

•  Hydrophilic membrane
•  Excellent for HPLC samples and general filtration
•  Compatible with organic and aqueous liquids
•  Good solvent resistance and high protein retention
•  Strong mechanical stability

Not suitable for use with strong acids or bases, halogenated hydrocarbons or protein

Special discounts are available for call-off and bulk orders, please enquire.

 Multiple Pore Sizes and Diameters Available. 

PTFE Hydrophobic

Features:

•  Hydrophobic membrane resistant to strong acids, aggressive solvents, alcohols, bases and aromatics
•  Ideal for the filtration and degassing of chromatography solvents and for extremely basic mobile phase solutions
•  Very low extractables
•  Mechanically strong
•  Excellent thermal stability
• Multiple Pore Sizes and Diameters Available. 

PTFE HydrophilicFeatures:

•  Hydrophilic membrane resistant to strong acids, aggressive solvents, alcohols, bases and aromatics
•  Ideal for the filtration and degassing of chromatography solvents and for extremely basic mobile phase solutions
•  Very low extractables
•  Mechanically strong
•  Excellent thermal stability
• Multiple Pore Sizes and Diameters Available. 

CELLULOSE NITRATE

Features:

•  Naturally hydrophilic
•  High physical strength
•  Ideal for clarification and filtration of aqueous samples
•  For immunoblotting, the high protein retention of Nitrocellulose is ideal to bind DNA
• Multiple Pore Sizes and Diameters available

CELLULOSE ACETATE

Features:

•  Hydrophilic membrane
•  Ideal for aqueous based samples, tissue

      culture media filtration and sensitive

      biological samples

•  Very low protein binding capacity,

lower than PVDF and PES membranes

•  High physical strength
•  Strength and dimension stability
•  Lower chemical resistance than Regenerated Cellulose

 Multiple Pore Sizes and Diameters available. 

PVDF (Hydrophobic)

Features:

•  Polyvinylidene difluoride membrane
•  Hydrophobic
•  Wide chemical compatibility
•  Excellent mechanical properties
•  Resistant to solvents, exhibits low levels of extractables
•  Low protein binding, can be used with proteins and peptides
•  Suitable for filtration of aqueous and organic solvents
• Multiple Diameters and Pore Sizes Available

MIXED CELLULOSE ESTERS - Gridded

Features:

Gridded MCE membranes are unsupported natural hydrophilic filters which have clearly defined grid lines.  The special ink used is non-toxic and completely free from bacterial growth inhibitors.  Composed of cellulose acetate and cellulose nitrate, they are one of the most widely used membranes in analytic and research applications.

The white gridded disks are specially designed for the recovery and retention of E.Coli bacteria in water/waste water analysis as well as other microbiological tests. 

The black gridded disks assist with manual counting procedures and provide enhanced contrast between residue or cell colours and the filter without having to counter stain the membrane.

Features

•  Hydrophobic
•  Gridded membrane is perfect for microbiology analysis
•  0.22µm, 0.45µm and 0.8µm pore sizes available
•  Sterilised by gamma irradiation
•  Individually packaged with easy to open separator paper

Applications

•  Clarification of aqueous solvents, removal and analysis of microbiological contaminants
•  Sterilizing filtration, air monitoring, particle monitoring, particle removal, bioassay
•  Dairy microbiology, retention of yeast, moulds and algae
•  QC analysis of fluid holding, particle collection and analysis

POLYETHERSULFONE

Features:

•  Inherently hydrophilic membrane
•  Low protein binding
•  Provides high flow rates and good throughput volume
•  Best choice for tissue culture work
•  Very low extractables
•  Mechanically strong membrane, suitable for use with strong bases, alcohols and resistive proteins
• Multiple Pore Sizes and Dimensions available.

POLYPROPYLENE

Features:

•  Hydrophobic, high resistance to solvents
•  High density with high capacity
•  Wide range of chemical compatibility to organic solvents
•  Ideal for biological sample filtration
•  Low protein binding
•  Ideal for chromatography protein analysis and biological sample filtration
•  Suitable for acids and bases and general HPLC analysis
• Multiple Pore Sizes and Dimensions available. 

GLASS FIBER

Features:

•  Binder Free
•  Commonly used as pre-filters for membranes to remove large particulates and prevent the membrane from silting   up
•  Extends the loading capacity of filter membranes
•  High flow rate and high permeability to air
•  Reduce filtration costs and premature clogging of membranes when filtering difficult or highly contaminated solutions
•  Excellent wet strength for easy handling and filter integrity
• Multiple Pore Sizes and Dimensions available. 

All Greyhound Vacuum Filtration Devices are made of stainless steel which is suitable for filtration, especially in the microbiological field.  

•  Each station uses a separate control valve for independent operation, is easy to use and to disinfect.
•  The multiple unit systems can filtrate three or six samples at the same time at a low flow rate, with high sensitivity.
•  Sturdy won’t tip when fully loaded due to the units having a low centre of gravity.
•  Anodized aluminum handles on both ends are designed for positioning on a benchtop.

Greyhound Solvent Filtration Apparatus are used for the filtration of HPLC mobile phases, to remove particulate and microbiological contaminants.  Manufactured of durable borosilicate glass for use with aqueous, organic or corrosive liquids.  

Can be sterilised in an autoclave at 121°C.

The base design has an integral vacuum connection located above the filtrate drip to prevent contamination of the vacuum line with droplets.

Unit consists of a funnel, coarse porosity fritted glass filter support base with integral vacuum connection and a flask with inner joint.  An aluminium clamp connects the funnel and support base.