An Amperometric microsensor for the determination of H2S in aquatic environments

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dc.contributor.author Jeroschewski, P. en_US
dc.contributor.author Steuckart, C. en_US
dc.contributor.author Kuhl, Michael en_US
dc.contributor.editor en_US
dc.date.accessioned 2012-02-02T05:02:27Z
dc.date.available 2012-02-02T05:02:27Z
dc.date.issued 1996 en_US
dc.identifier 2009005596 en_US
dc.identifier.citation Jeroschewski P., Steuckart C., and Kuhl Michael 1996, 'An Amperometric microsensor for the determination of H2S in aquatic environments', ACS Publications, vol. 68, pp. 4351-4357. en_US
dc.identifier.issn 0003-2700 en_US
dc.identifier.other C1UNSUBMIT en_US
dc.identifier.uri http://hdl.handle.net/10453/14597
dc.description.abstract A new amperometric microsensor for detection of dissolved H2S in aquatic environments was developed. The design of the microsensor is based on the same principle as the Clark-type oxygen microsensor. The sensor is equipped with a glass-coated platinum working electrode and a platinum guard electrode positioned in an outer glass casing (tip diameter 20-100 ?m). Both working electrode and guard electrode were polarized at a fixed value in the range from +85 to + 150 mV with respect to a counter electrode. The outer casing is sealed with a thin silicone membrane and filled with a buffered electrolyte solution containing ferricyanide (K3[Fe(CN)6]) as redox mediator. Hydrogen sulfide penetrates the silicone membrane and is oxidized by K3[Fe(CN)6], resulting in the formation of elemental sulfur and ferrocyanide (K4[Fe(CN)6]). The latter is electrochemically reoxidized at the exposed end of the platinum working electrode, thereby creating a current that is directly proportional to the dissolved H2S concentration at the sensor tip. The sensor was characterized and calibrated in a flow-through cell combined with a coulometric sulfide generator. Difficult studies including the determination of H2S with high spatial and temporal resolution seem to be possible. en_US
dc.language en_US
dc.publisher ACS Publications en_US
dc.relation.isbasedon http://dx.doi.org/10.1021/ac960091b en_US
dc.title An Amperometric microsensor for the determination of H2S in aquatic environments en_US
dc.parent Analytical Chemistry en_US
dc.journal.volume 68 en_US
dc.journal.number en_US
dc.publocation Ohio, USA en_US
dc.identifier.startpage 4351 en_US
dc.identifier.endpage 4357 en_US
dc.cauo.name SCI.Environmental Sciences en_US
dc.conference Verified OK en_US
dc.for 030100 en_US
dc.personcode 0000062489 en_US
dc.personcode 0000062490 en_US
dc.personcode 107129 en_US
dc.percentage 100 en_US
dc.classification.name Analytical Chemistry en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
dc.description.keywords NA en_US
dc.staffid en_US
dc.staffid 107129 en_US


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