Did you know that the quoted pore size of an ultrafiltration membrane is the maximum pore size?

X-section of an Ultrafiltration Membrane

What is the Maximum Quoted Pore Size of an Ultrafiltration Membrane?

The minimum pore size is smaller. The UF membrane is not a mesh with defined and uniform holes! A 100 kDa MWCO PES membrane will retain up to 80% of 66 kDa BSA. A 300 kDa MWCO PES membrane will retain up to 70% of 150 kDa IgG.

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