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

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


Jason J. Horn

Tom Mccreedy


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.


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.

Journal Article Type Article
Acceptance Date Jun 21, 2010
Online Publication Date Aug 10, 2010
Publication Date Sep 1, 2010
Print ISSN 1759-9660
Electronic ISSN 1759-9679
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 2
Issue 9
Pages 1346-1354
Keywords Platinum-electrodes; Carbon-dioxide; Oxidation
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