Determination of sulfur dioxide by reaction with electrogenerated bromine in a thin-layer cell having a gas-porous wall
An electrochemical sensor is described for the determination of ambient sulfur dioxide by reaction with electrochemically generated bromine in a thin-layer cell. Sulfur dioxide in the gas phase diffuses through a porous, hydrophobic membrane into a thin layer of solution in which bromine is generated electrochemically. The quantity of bromine at the gas-solution interface is determined by reduction at a gold cathode situated on the solution side of the porous wall separating the gas phase from the solution phase. The diffusion of sulfur dioxide through the porous membrane into the thin-layer cell decreases the amount of bromine reaching the gold cathode. This decrease produces a change in current that is proportional to the concentration of sulfur dioxide in the gas phase. The device was evaluated for sensitivity and stability for the determination of ppM levels of sulfur dioxide.
- Research Organization:
- State Univ. of New York, Buffalo
- OSTI ID:
- 6586181
- Journal Information:
- Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 52:14; ISSN ANCHA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Continuous conductometric sensor for carbon dioxide
Electrochemical performance and transport properties of a Nafion membrane in a hydrogen-bromine cell environment
Related Subjects
400102* -- Chemical & Spectral Procedures
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION MONITORS
BROMINE
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
DATA
ELECTROLYTIC CELLS
ELEMENTS
EXPERIMENTAL DATA
HALOGENS
INFORMATION
MEASURING INSTRUMENTS
METERS
MONITORS
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR METERS
SULFUR OXIDES