Chemistry: physical processes – Physical processes – Crystallization
Patent
1980-09-30
1981-11-17
Serwin, Ronald
Chemistry: physical processes
Physical processes
Crystallization
422 59, 422 60, 422 61, 422 88, G01N 3122, G01N 2178
Patent
active
043009107
ABSTRACT:
A method of measuring gas, vapor and aerosol components in an air sample, using a gas detecting device, includes a glass tube having openable ends for the flow of test gas therethrough and a filter therein entraining components to be measured, comprises, breaking an ampoule of a liquid solvent for the materials entrained by the filter to cause the solvent to pass through the filter into a granular reaction layer and then through an empty chamber. The testing tube includes a liquid lock which is formed by a hydrophobic paper which is disposed downstream of the empty chamber so as to retain the reacting products in the chamber so they may be viewed. The reactant products undergo a color change in proportion to a substance to be detected, such as sulfuric acid, for example.
REFERENCES:
patent: 2908555 (1959-10-01), Grosskopf
patent: 3022141 (1962-02-01), Grosskopf
patent: 3446596 (1969-05-01), Salivar et al.
patent: 3689224 (1972-09-01), Agnew et al.
patent: 3740196 (1973-06-01), Stroterhoff
patent: 3966412 (1976-06-01), Stroterhoff
patent: 4042336 (1977-08-01), Larsson
Dragerwerk Aktiengesellschaft
Serwin Ronald
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