Whatman PTFE Membranes WTP 47mm 1.0µm Pack of 100

£538.00 excl. VAT
£645.60
incl. VAT

SKU - 1154301

7590-004

SKU -

1154301

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Description
Compatibility

The WTP range of filters by Whatman are PTFE membranes are chemically stable and inert. They are suitable for applications involving aggressive organic solvents, strong acids and alkalis. These PTFE membranes are particularly suitable for preparing samples for HPLC analysis. The hydrophobic nature of the membrane also has applications for air and gas sterilization. The membrane is laminated onto a non-woven polypropylene support web for improved strength and handling and can be used at temperatures up to 120ºC.

One of the major applications for the PTFE membrane is the clarification of corrosives, solvents and aggressive fluids. This includes the important requirement in HPLC analysis for sample filtration where any solid particles can cause permanent damage to the column. The 0.5µm pore size is normally used. Air and gas sterilization make use of the hydrophobic characteristics of PTFE membranes and their ability to stop aqueous aerosols. Usual pore sizes are 0.2µm and 0.5µm. Sterile venting of vacuum manifolds, fermentation vessels and sterile filtrate tanks and containers utilize PTFE 0.2µm membranes.

The WTP membranes use a polypropylene grid as the support material

Guide to…Membrane Filter Properties

Identifying the filter material most suitable for your application based upon the nature of the liquid or gas you are filtering will ensure the best performance of your filter. Each membrane filter material has differing chemical and physical properties such as hydrophobicity, flow rate, extractables and protein retention making them suited to differing applications. Once you have selected the most compatible filter material, you will need to consider what pore size is most appropriate.

Membrane Material	Protein binding	Hydrophilic/Hydrophobic	Chemical resistance	Applications
Hydrophilic PTFE	Low	Hydrophilic	High	Purification of HPLC organic and solvent/aqueous solutions
Hydrophobic PTFE	Low	Hydrophobic	High	Filtration of solvents
PES	Low	Hydrophilic	Low/Medium	Purification of tissue culture solutions, buffers
PVDF	Low	Hydrophilic	Medium	Filtration of protein solutions
NYL	Medium	Hydrophilic	Medium	Filtration of aqueous and solvent/aqueous mixtures
CA	Low	Hydrophilic	Low	Filtration of protein solutions
CN	High	Hydrophilic	Low	Filtration of aqueous solutions where protein binding is not a concern and microbioloigical applications.
RC	Low	Hydrophilic	Medium	Filtration of aqueous and organic solvents and protein recovery applications.