Membrane for microbiological analysis
AssigneeSartorius Stedim Biotech GmbH
InventorsAndrea Ernst, Elke Rüngeling, Bastian Gniewosz, Katharina Mazurek-Swidereck, Niels Wagner
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Abstract
A membrane for microbiological analysis, a production method of a membrane for microbiological analysis, and the use of such membranes for microbiological analysis. Examples include a cellulose membrane for microbiological analysis that is impregnated with a non-ionic surfactant in an amount of from 100 ng/cm2 to 1.0 mg/cm2, with the membrane having a nominal pore size of from 0.20 μm to 0.80 μm, and a cumulative adsorption pore volume of less than 0.010 cm3/g.
Claims17
A cellulose membrane for microbiological analysis, wherein the membrane is impregnated with a non-ionic surfactant in an amount of from 100 ng/cm2 to 1.0 mg/cm2,
- the membrane has a nominal pore size of from 0.20 μm to 0.80 μm, and
- the membrane has a cumulative adsorption pore volume of less than 0.010 cm3/g.
A method of producing a cellulose membrane, comprising the steps of
- (a) preparing a feedstock membrane from a cellulose membrane casting solution by phase inversion in an evaporation process,
- (b) drying the feedstock membrane, and
- (c) impregnating the dried membrane with a non-ionic surfactant by bringing the dried membrane in contact with a surfactant solution having a surfactant concentration of from 0.001 wt % to 1.0 wt % to produce the cellulose membrane,
- wherein the step (a) comprises subjecting the applied membrane casting solution to a gas atmosphere containing a non-solvent with respect to membrane polymers.
(canceled)
Dependencies are inferred from the claim text.