Amperometric measurement of gaseous hydrogen sulfide via a Clark-type approach

Horn, Jason J.; Wadhawan, Jay; Mccreedy, Tom

Abstract

The direct oxidation of hydrogen sulfide in the range 2.0-20 parts per million by volume (ppmv) using a Clark-type amperometric gas sensing methodology is investigated via amperometric transients at 298 K. The diluent gas employed is air (20.9% O-2 in N-2), and it is shown that the observed current transients are limited by transport through the membrane covering, reaching a steady-state value within at least 200 s for one of the manifestations described. The measurement system presented is shown to be operational over a long time (tens of hours), provided certain quantification protocols are employed; the latter are suggested as pragmatic guidelines for the deployment of this detection methodology. Importantly and notably, it is shown that readily-oxidizable gases such as carbon monoxide and molecular hydrogen are observed not to interfere with the measurement quantification.

Citation

Horn, J. J., Wadhawan, J., & Mccreedy, T. (2010). Amperometric measurement of gaseous hydrogen sulfide via a Clark-type approach. Analytical Methods, 2(9), 1346-1354. https://doi.org/10.1039/c0ay00338g

• Journal Article Type: Article
• Acceptance Date: Jun 21, 2010
• Online Publication Date: Aug 10, 2010
• Publication Date: Sep 1, 2010
• Journal: ANALYTICAL METHODS
• Print ISSN: 1759-9660
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 2
• Issue: 9
• Pages: 1346-1354
• DOI: https://doi.org/10.1039/c0ay00338g
• Keywords: Platinum-electrodes; Carbon-dioxide; Oxidation
• Public URL: https://hull-repository.worktribe.com/output/396260