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

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.

Inventors:
 [1];  [2];  [3]
  1. (Eugene, OR)
  2. (Roseburg, OR)
  3. (Yoncalla, OR)
Issue Date:
Research Org.:
Umpqua Research Company (Myrtle Creek, OR)
OSTI Identifier:
872321
Patent Number(s):
5910448
Assignee:
Umpqua Research Company (Myrtle Creek, OR) OAK
DOE Contract Number:  
FG03-93ER81641
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
process; analyzing; air; water; comprises; providing; membrane; separating; sample; phase; analyte; transported; liquid; including; ionized; conductive; dissociated; species; concentration; chemically; amplified; water-soluble; chemical; reagent; reversibly; reacts; undissociated; produce; conductivity; changes; therein; corresponding; fluctuations; partial; pressure; finally; introduced; measuring; instrument; detected; sample phase; comprises providing; measuring instrument; liquid phase; partial pressure; phase including; reversibly react; chemical reagent; changes therein; analyte phase; /436/73/422/

Citation Formats

Atwater, James E., Akse, James R., and DeHart, Jeffrey. Process for analyzing CO.sub.2 in air and in water. United States: N. p., 1999. Web.
Atwater, James E., Akse, James R., & DeHart, Jeffrey. Process for analyzing CO.sub.2 in air and in water. United States.
Atwater, James E., Akse, James R., and DeHart, Jeffrey. Fri . "Process for analyzing CO.sub.2 in air and in water". United States. https://www.osti.gov/servlets/purl/872321.
@article{osti_872321,
title = {Process for analyzing CO.sub.2 in air and in water},
author = {Atwater, James E. and Akse, James R. and DeHart, Jeffrey},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

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