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Accurate and precise coulometric determination of sulfur dioxide in compressed gas mixtures
Accurate and precise coulometric determination of sulfur dioxide in compressed gas mixtures
- Source :
- Journal of Research of the National Institute of Standards and Technology
- Publication Year :
- 1991
- Publisher :
- National Institute of Standards and Technology (NIST), 1991.
-
Abstract
- Coulomctry has been established as an important and reliable method for the determination of acidic compounds. The analytical method and simple apparatus described here are applied to the precise and accurate determination of sulfur dioxide in nitrogen, specifically in compressed gas cylinders at nominal concentrations of 50 and 100 |xmol/mol (ppm). This method is constant current coulometry where the magnitude of the current is set by the balance between the electrochemical generation of OH", the flow of SO2, and the chemical reaction of the solution. The method is direct, rapid, and can be refined further to provide analysis at the nanomol/mol level.
- Subjects :
- Materials science
General Engineering
Analytical chemistry
compressed gas
chemistry.chemical_element
Electrochemistry
analysis of gases
Chemical reaction
Nitrogen
Article
acid rain
Coulometry
chemistry.chemical_compound
coulometry
chemistry
sulfur dioxide
Constant current
Acid rain
Current (fluid)
Sulfur dioxide
Subjects
Details
- ISSN :
- 1044677X
- Volume :
- 96
- Database :
- OpenAIRE
- Journal :
- Journal of Research of the National Institute of Standards and Technology
- Accession number :
- edsair.doi.dedup.....0f517d51bf55edfc713dce4436544496
- Full Text :
- https://doi.org/10.6028/jres.096.030