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Abstract

Gas analysis, intended primarily for the quantitative and qualitative analysis of sulfur, is performed utilizing flame photometry by burning a sample of the gas to be analyzed in a hydrogen rich flame in which combustion is supported by an excess of oxygen. A second hydrogen rich flame is used to reduce any sulfur present. A third flame is used to establish a thermal gradient which is particularly suited for the observation of the wavelengths emitted by sulfur. The actual detection of light emissions is accomplished using an appropriate filter and a photomultiplier tube. The detector of the present invention utilizes platinum flame holders in the first two flames and a platinum filament to induce the third flame and establish the aforementioned thermal gradient. A fourth platinum flame holder, preferably in the form of a mesh, is used to prevent flickering of the burning effluent gases which leave the detector, thereby reducing the noise level.

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First Claim