Chemistry: analytical and immunological testing – Sulfur containing – Total or elemental sulfur
Patent
1992-04-24
1995-06-13
Alexander, Lyle A.
Chemistry: analytical and immunological testing
Sulfur containing
Total or elemental sulfur
436119, 436172, 436122, G01N 2176
Patent
active
054242177
ABSTRACT:
A process and apparatus are disclosed for the detection and measurement of sulfur in both organic and inorganic sulfur-containing compounds. The process includes admixing a sample including a sulfur-containing compound with oxygen, and then exposing the mixture to a source of combustion causing heat in the presence of a combustion supporting reducing agent at a combustion site. The resulting gaseous combustion products are vacuum extracted from the combustion site, and then directed into a darkened low pressure chamber. The combustion products in the low pressure chamber are then contacted with ozone, with the result that the sulfur combustion products are converted to chemiluminescent sulfur dioxide. The emitted chemiluminescence is then detected, and may be measured to provide a quantitative indication of the amount of sulfur in the original sample. The preferred source of oxygen is air, the preferred form of combustion heat is a flame, and the preferred form of reducing agent is hydrogen gas.
REFERENCES:
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patent: 4352779 (1982-10-01), Parks
patent: 4678756 (1987-07-01), Parks
Shearer et al., "Analysis of sulfur compounds by capillary column gas chromotography with sulfur chemiluminescence detection", J. of Chromat. Science, vol. 28, pp. 24-28 (Jan. 1990).
Benner "Development of the sulfur chemiluminescence detector", a dissertation present at the U. of Denver, Sep. 1991.
Benner Richard L.
Stedman Donald H.
Alexander Lyle A.
Sievers Instruments, Inc.
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