Continuous conductometric sensor for carbon dioxide
A continuous conductometric sensor is described for the determination of carbon dioxide in the atmosphere and in nonacidic and nonbasic gases. Gaseous carbon dioxide diffuses through a hydrophobic, gas-porous membrane into a thin layer of pure water. The back wall of the thin water layer is a porous screen that separates the water layer from a mixed-bed ion exchanger column. The ion exchanger continuously removes ionic species from the water layer including the products from the dissociation of CO/sub 2/(aq). Conductivity electrodes positioned in the thin water layer measure its conductance. The diffusion of carbon dioxide through the membrane into the thin water layer and the removal of ionic species through the screen by the mixed-bed ion exchanger establish a steady-state concentration gradient of CO/sub 2/. This gradient is proportional to the partial pressure of CO/sub 2/ in the gas phase, and cell conductance is proportional to P/sub CO/sub 2///sup 1/2/. This device was evaluated for use in the determination of carbon dioxide levels up to approx. 1% and conformed to the theoretical predictions.
- Research Organization:
- State Univ. of New York, Buffalo
- OSTI ID:
- 5498226
- Journal Information:
- Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 58:8; ISSN ANCHA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Conductometric sensor for parts per billion sulfur dioxide determination
Stabilization of a co-bound intermediate via molecular tuning promotes CO2-to-ethylene conversion
Related Subjects
400102* -- Chemical & Spectral Procedures
400400 -- Electrochemistry
AIR
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL ANALYSIS
DATA
DIFFUSION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRODES
EXPERIMENTAL DATA
FLUIDS
GASES
HYDROGEN COMPOUNDS
INFORMATION
ION EXCHANGE
MEMBRANES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PARTIAL PRESSURE
PHYSICAL PROPERTIES
QUANTITATIVE CHEMICAL ANALYSIS
VOLTAMETRY
WATER