Flame photometric detector adapted for use in hydrocarbon stream

Details Flame photometric detector adapted for use in hydrocarbon stream Flame photometric detector adapted for use in hydrocarbon stream

1979-01-15

1980-11-18

Corbin, John K.

Optics: measuring and testing

By shade or color

With color transmitting filter

250554, 431268, G01J 348

Patent

active

042342570

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.

REFERENCES:
patent: 3245459 (1966-04-01), Keith
patent: 3489498 (1970-01-01), Brody et al.
patent: 4097239 (1978-01-01), Patterson
"Detectors in Gas Chromatography" by Jiri Sevcik, Amer. Elsevier, Pub. Co., Inc., N.Y. 1975, pp. 145-164.
A New Concept of Flame Photometric Detection of GC Effluents" by P. Paterson, R. Howe, U. Hornung, and Ahmad Abu-Shumays, Varian Inst. Div.

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