These filters are 33mm Polypropolene Lined Filters for less clogging than cheaper paper lined filters. All are sterile and come sealed in their own packaging.
They can handle 50psi of pressure and
are as good as the Whatman GDX.
Whatman® GD/X Filters,
25mm/0.45 Micron HPLC Filters
$8.50 each
Sale $7.50
$7.50 each
These filters are specifically designed for high particulate loads. They are constructed with a pigment-free polypropylene housing. Inside is a prefiltration stack consisting of both GMF 150 and GF/F glass microfiber media. This eliminates sample contamination and allows for use of minimal hand-pressure, even with the most difficult samples.
The final PVDF membrane is very stable and shows good resistance to most HPLC solvents. Protein binding is low. Slightly hyrophobic nature with low water breakthrough.
This 25mm size is best for samples over 10mL.
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TIP ON SOLVING FILTER CLOGGING:
This is a problem many people have and you should be able to filter 100cc through a Whatman filter if done correctly. Read this part two or three times until you understand what is being said. Take the 10cc push tube and suck up the oil, flip the push tube upside down and take off the needle. Push up on the plunger and get all the air that may be lingering out of the push tube. Next take the whatman filter and twist it on. With the push tube still upside down begin to push the plunger until you notice liquid coming out the small hole in the whatman filter ( What you are doing is pre wetting the filter media and getting any air out of the filter) Now you can put the needle on the whatman filter and begin your filtering.
All Filters for Removing Breathing Spores in Aroma Therapy
