Chemistry: analytical and immunological testing – Oxygen containing – Inorganic carbon compounds
Patent
1994-10-31
1997-07-01
Housel, James C.
Chemistry: analytical and immunological testing
Oxygen containing
Inorganic carbon compounds
436150, 436178, 422 8202, 73 6141, G07N 3318
Patent
active
056437994
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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Akse James R.
Atwater James E.
DeHart Jeffrey
Freed Rachel Heather
Housel James C.
Umpqua Research Company
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