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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. 43 figs.

Inventors:
; ;
Issue Date:
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
6151749
Patent Number(s):
5910448
Application Number:
PPN: US 8-826645
Assignee:
Umpqua Research Co., Myrtle Creek, OR (United States)
DOE Contract Number:  
FG03-93ER81641
Resource Type:
Patent
Resource Relation:
Patent File Date: 4 Apr 1997
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; AIR POLLUTION MONITORING; CARBON DIOXIDE; DISSOCIATION; IONIC CONDUCTIVITY; IONIZATION; MEASURING INSTRUMENTS; MEMBRANE TRANSPORT; WATER CHEMISTRY; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; CHEMISTRY; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; MONITORING; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; 540120* - Environment, Atmospheric- Chemicals Monitoring & Transport- (1990-); 540320 - Environment, Aquatic- Chemicals Monitoring & Transport- (1990-)

Citation Formats

Atwater, J E, Akse, J R, and DeHart, J. Process for analyzing CO[sub 2] in air and in water. United States: N. p., 1999. Web.
Atwater, J E, Akse, J R, & DeHart, J. Process for analyzing CO[sub 2] in air and in water. United States.
Atwater, J E, Akse, J R, and DeHart, J. Tue . "Process for analyzing CO[sub 2] in air and in water". United States.
@article{osti_6151749,
title = {Process for analyzing CO[sub 2] in air and in water},
author = {Atwater, J E and Akse, J R and DeHart, J},
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. 43 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {6}
}