Process for analyzing CO.sub.2 in air and in water

Details Process for analyzing CO.sub.2 in air and in water Process for analyzing CO.sub.2 in air and in water

1997-04-04

1999-06-08

Snay, Jeffrey

Chemistry: analytical and immunological testing

Oxygen containing

Inorganic carbon compounds

436150, 436178, 422 8202, 73 6141, G01N 3318

Patent

active

059104481

ABSTRACT:
The process of this invention comprises providing a membrane for separating CO.sub.2 into a first CO.sub.2 sample phase and a second CO.sub.2 analyte phase. CO.sub.2 is then transported through the membrane thereby separating the CO.sub.2 with the membrane into a first CO.sub.2 sample phase and a second CO.sub.2 analyte liquid phase including an ionized, conductive, dissociated CO.sub.2 species. Next, the concentration of the ionized, conductive, dissociated CO.sub.2 species in the second CO.sub.2 analyte liquid phase is chemically amplified using a water-soluble chemical reagent which reversibly reacts with undissociated CO.sub.2 to produce conductivity changes therein corresponding to fluctuations in the partial pressure of CO.sub.2 in the first CO.sub.2 sample phase. Finally, the chemically amplified, ionized, conductive, dissociated CO.sub.2 species is introduced to a conductivity measuring instrument. Conductivity changes in the chemically amplified, ionized, conductive, dissociated CO.sub.2 species are detected using the conductivity measuring instrument.

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