Abstract: The invention is directed to a furnace suited for oxidation of a gaseous starting mixture comprising one or more sulphur compounds to obtain an oxidized gas mixture and reduction of the oxidized gas mixture to obtain a gaseous mixture of reduced sulphur compounds comprising an interior furnace space, an inlet conduit for the gaseous starting mixture, an inlet for supply of an oxygen comprising gas, a ceramic comprising outlet conduit provided with an inlet opening for the mixture of reduced sulphur compounds, an inlet for hydrogen and heating means, wherein the inlet opening of the outlet conduit is comprised of more than one opening which openings fluidly connect the interior furnace space and the interior of the outlet conduit.

Abstract: The invention is directed to a method for chemiluminescent sulphur detection wherein the method comprises the following steps. (a) oxidation of a gaseous starting mixture comprising one or more sulphur compounds to obtain an oxidized gas mixture. (b) reduction of the oxidized gas mixture as obtained in step (a) to obtain a gaseous mixture of reduced sulphur compounds in the presence of a ceramic surface. (c) reacting the mixture of reduced sulphur compounds obtained in step (b) with ozone to obtain a sulphur compound in excited state and measuring a chemiluminescent emission of the sulphur compound in excited state to obtain a measure for the amount of sulphur compounds in the gaseous starting mixture. The ceramic surface in step (b) is a magnesium aluminium silicate comprising surface.