Aqueous carbon dioxide monitor

Details Aqueous carbon dioxide monitor Aqueous carbon dioxide monitor

1990-03-26

1991-11-26

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing liquid or solid sample

422 90, 436133, 436150, G01N 2706

Patent

active

050680900

ABSTRACT:
An apparatus and method for the measurement of low levels of carbon dioxide in a sample employing membrane separation and ion-exchange technology. The difference in acid strength of carbonic acid and other acids is exploited by first treating the sample with a weak base in a membrane separator and then with a strong base in the membrane separator. In this manner, the carbonic acid is distinguished from the stronger acids. By converting carbonic acid to sodium carbonate, the conductivity level is enhanced facilitating more precise measurements.

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patent: 3558279 (1971-01-01), McRae et al.
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patent: 4228400 (1980-09-01), Bruckenstein et al.
patent: 4293522 (1981-10-01), Winkler
patent: 4517135 (1985-05-01), Szerenyi et al.
patent: 4801551 (1989-01-01), Byers et al.

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