TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The membrane has a breakthrough pressure of 50-90 kPa gauges when using an isopropanol test solution. The side of the membrane having the coating has a porosity being a ratio of the area of pores to the total area of the membrane of 5-95%. The membrane has a water contact angle of at least 129 degrees. In the membrane, wetting of the micropores by the liquid solvent when calculated by weighting the inverse of diffusivity values for carbon dioxide through the gas and liquid phases is less than 1%. A root means square of the roughness of the coating is 400-600 nm. The membrane has a tubular conformation in which the coating is applied to inside and/or outside surfaces of the tubular conformation.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The coating is a hydrophobic coating that opposes or resists an aqueous solvent from penetrating the pores of the substrate from the side having the coating. The substrate is a polymeric material which includes thermoplastics and thermoset plastics. The substrate is a polymeric material including organic based polymers including cellulosic acetates, polyacrylates, poly amides, polyesters, polycarbonates, polyimides, polystyrenes and/or polyolefins. The polyolefins have at least two carbon atoms in each repeating unit. The substrate is polypropylene having a thickness of greater than 2 microns. The coating comprises an oxygenated coating, nitrogenated coating, chlorinated coating, siliconated coating and/or fluorinated coating (preferred). The coating is a fluorinated coating or fluorine rich coating that is formed by physical vapor deposition of a fluoride containing material including sodium or silicon fluorides, organofluorides or fluorocarbons including Teflon (RTM: Polytetrafluoroethylene) or tetrafluoromethane. The fluorine to carbon ratio of the coating based on the C1s spectra analysis is 1.2-1.9. The coating opposes or resists the liquid solvent from penetrating and wetting the pores thus facilitating transfer of the targeted substance between the aqueous and gas phase phases. The targeted material is polytetrafluoroethylene. EXAMPLE - No suitable example given.