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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

Authors :
A. A. Bell
G. D. Mitchell
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.

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