Patent ID: 8114509
Filing Date: 2012-02-14
Classification: B01D,G01N,Y10T

Abstract:
1. A gas permeable membrane for the optical measurement of the partial pressure and/or the concentration of a gas species, the membrane comprising a porous light-transmissible membrane matrix comprising a metal oxide wherein the membrane mix is at least partially charged with at least one gas-selective compound by incorporation, whose optical characteristics changes upon an interaction with a correspondingly selected gas species, characterized in that the average pore diameter of the membrane matrix ranges from 1 to 50 nanometers and the total pore volume ranges from 1 to 30 mL/m 2 , and in that the metal oxide is taken from the group consisting of pseudo-boehmite with the general formula Al 2 O 3 n*H 2 O, wherein n ranges from 1 to 1.5, and an alumina oligomer.