Process for analyzing CO[sub 2] in air and in water

Patent · Tue Jun 08 00:00:00 EDT 1999

OSTI ID:6151749

Atwater, J E; Akse, J R; DeHart, J

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.

• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG03-93ER81641
• Assignee: Umpqua Research Co., Myrtle Creek, OR (United States)
• Patent Number(s): US 5910448; A
• Application Number: PPN: US 8-826645
• OSTI ID: 6151749
• Resource Relation: Patent File Date: 4 Apr 1997
• Country of Publication: United States
• Language: English

Related Subjects

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-)