Type of membrane

Observations

Cellulose acetate (Whatman)

Pore size: 0.45 μm

retention: (−)

Immobilon (+) (Millipore)

Pore size: 0.45 μm

retention: (−)

Teflon

(Millipore) Pore size: 1 μm

retention: (−)

Mixed Esters

(Schleicher & Schuell) Pore size: 0.45 μm

retention: (−)

Filterpaper

(S & S) Black ribbon

retention: (−)

Filter paper

(S & S) Blue ribbon

retention: (−)

Nylon

(Millipore) Pore size: 0.45 μm

retention: (+)