Sulfur dioxide analysis system

Details Sulfur dioxide analysis system Sulfur dioxide analysis system

1982-02-02

1986-02-11

Turk, Arnold

Chemistry: analytical and immunological testing

Sulfur containing

Sulfur dioxide

422 80, 422 88, 422 90, 436150, 436158, 436175, 436178, G01N 3112, G01N 2706

Patent

active

045699186

ABSTRACT:
A sulfur dioxide-containing analysis stream, such as formed by the oxidative pyrolysis of a sulfur-containing liquid, is passed through a trapping medium comprising metal or metal oxide, preferably nickel oxide, wherein the sulfur dioxide is retained while the remainder of the gas flows through. Thereafter, the flow of analysis gas is discontinued and the trap zone is heated to release the sulfur dioxide, which is passed in an inert carrier gas stream through a sulfur dioxide detector such as a conductivity cell. Halides in the analysis stream are removed prior to trapping by being dissolved in an aqueous liquid in a scrubbing chamber. Such chamber is regenerated by vaporizing the halide-containing aqueous solution and venting it. Also, a system of the foregoing type including two traps and a single detector whereby two samples are alternately analyzed and trapped to reduce the overall analysis time.

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Oita, Analytical Chemistry, vol. 55, 1983, No. 14, pp. 2434-2436.
Lowell et al., Ind. Eng. Chem. Process Des. Develop. vol. 10, No. 3, 1971, pp. 384-390.
Oita, I. J., "Determination of Sub-ppm Levels of Sulfur", Abstract 119, American Chemical Society, Las Vegas, Nevada Meeting (Aug. 27, 1980).

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