Liquid electrolyte for an electrochemical gas sensor

A method, comprising:

• preparing an electrolyte, the method comprising the steps of:
• charging the solvent into the reaction vessel;
• adding the buffer;
• adding the organic mediator, the organic mediator being a polyhydroxy compound which forms a quinoid system or a naphthalene system during oxidation, wherein the organic mediator is selected from the group containing substituted ortho-dihydroxybenzenes, substituted paradihydroxybenzenes, dihydroxynaphthalene, substituted dihydroxynaphthalane, anthrahydroquinone, substituted anthrahydroquinone;
• heating of the mixture while stirring for about 15 minutes at 150° C.;
• stirring for about one hour without further supply of heat until all solids are dissolved;
• cooling to room temperature;
• and
• adding the conductive salt;
• providing an electrochemical gas sensor comprising the electrolyte;
• detecting one of ammonia and ammonia-containing gas mixtures via the electrochemical gas sensor.