Patent ID: 6230545
Filing Date: 2001-05-15
Classification: G01N

Abstract:
A sensor membrane of an optode, for determination of at least one parameter of a sample of a gas or gas mixture, said parameter selected from the group consisting of chemical and physical parameters, said sensor membrane comprising an indicator substance, wherein the indicator substance changes the sensor membrane with respect to at least one property selected from the group consisting of absorption for electromagnetic radiation and optical refraction index, upon at least indirect contact with the sample of the gas or gas mixture,wherein the sensor membrane is gas-permeable,wherein the indicator substance is gas specific,wherein the indicator substance comprises at least one compound which interacts in a chemically or physically reversible fashion with a gas to be determined, andwherein the compound is selected from the group consisting of the azobenzenes, acetophenones, corrins, porphyrins, phthalocyanines, corrols, macrolides, porphyrinogens, nonactin, valinomycin, and complexes of molecules selected from the group of corrins, phthalocyanines, corrols, porphyrinogens and porphyrins with transition metals of the I-II or V-VIII subgroup.