Conductometric sensor for parts per billion sulfur dioxide determination

Journal Article · Tue Jul 01 00:00:00 EDT 1986 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00121a038· OSTI ID:5698316

Symanski, J S; Bruckenstein, S

A conductometric sensor for the determination of atmospheric sulfur dioxide levels is described. It consists of a hydrophobic, gas-porous membrane that separates the gas sample from a thin film of pure water. Sulfur dioxide from the gas phase diffuses through the membrane and rapidly equilibrates in the water layer. Conductivity electrodes positioned within the thin layer measure its conductance. The theory relating the square of the equilibrium conductance to the partial pressure of sulfur dioxide is given. The behavior of the sensor to sulfur dioxide is characterized and contrasted to that of carbon dioxide. Linear calibration curves were obtained over a range of 20-1000 ppb SO/sub 2/. Response times were on the order of 90-120 s.

• Research Organization: State Univ. of New York, Buffalo
• OSTI ID: 5698316
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 58:8; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
400400 -- Electrochemistry
AIR
CHALCOGENIDES
CHEMICAL ANALYSIS
DATA
DIFFUSION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRODES
EXPERIMENTAL DATA
FLUIDS
GASES
HYDROGEN COMPOUNDS
INFORMATION
MEMBRANES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PARTIAL PRESSURE
PHYSICAL PROPERTIES
QUANTITATIVE CHEMICAL ANALYSIS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TRACE AMOUNTS
VOLTAMETRY
WATER