Method for monitoring aqueous carbon dioxide

Details Method for monitoring aqueous carbon dioxide Method for monitoring aqueous carbon dioxide

1991-07-12

1992-12-15

Housel, James C.

Chemistry: analytical and immunological testing

Oxygen containing

Inorganic carbon compounds

422 90, 422 8202, 436133, 436150, G01N 2706

Patent

active

051716941

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.

REFERENCES:
patent: 4209299 (1980-06-01), Carlson
patent: 4228400 (1980-10-01), Bruckenstein
patent: 4293522 (1981-10-01), Winkler
patent: 4517135 (1985-05-01), Szerenyi et al.

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