Method and apparatus for analyzing gaseous mixtures

Details Method and apparatus for analyzing gaseous mixtures Method and apparatus for analyzing gaseous mixtures

1974-09-20

1976-12-14

Williams, Howard S.

Chemistry: physical processes

Physical processes

Crystallization

23254E, 23232R, 23254R, G01N 3300

Patent

active

039974162

ABSTRACT:
A method and apparatus for analyzing gaseous mixtures by decomposing predetermined components of a sample of the mixture with ultraviolet radiation and thereafter measuring the amount of decomposition products produced as an indirect determination of the composition of the original sample. In one embodiment, the apparatus can measure the presence of less than one part per million of vinyl chloride in air by scrubbing a sample of gas to remove interfering compounds, decomposing the vinyl chloride by exposure to ultraviolet radiation, measuring the decomposition products by absorbing them in deionized water, and determining the change in electrical conductivity of the resulting solution as a measure of the amount of vinyl chloride in the sample.

REFERENCES:
patent: 2541578 (1975-10-01), Egalon et al.
patent: 3926560 (1975-12-01), Gentry

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