Abstract: The present invention provides an economical and efficient system for the catalytic conversion of ozone, particularly in airplane bleed air. The present invention comprises a washcoat on a single surface layer, wherein the washcoat may contain an active metal oxide which is active for ozone conversion where the metal oxide comprises a transition metal. Alternatively, the system may comprise a refractory metal oxide washcoat into which a transition metal active for ozone conversion is impregnated.

Abstract: The invention relates to a method and an apparatus for determining product-specific quality parameters of liquid, especially liquid (14) containing alcohol and held in a container (12) such as a bottle or can, the quality parameters being determined by means of sensors (22, 24, 26). To enable performing measurements with simply provisions and without complicated specimen preparation, and avoiding cross-sensitivities, it is proposed that the quality parameters of the liquid are determined under the conditions prevailing in the container, and liquid is initially delivered, under the pressure prevailing in the container, to a temperature unit (32) and adjusted to a temperature that corresponds to that of the sensors, and is then delivered to the sensors.