Fluorometric fiber optic drop sensor for atmospheric hydrogen sulfide

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dc.contributor.authorCardoso, A. A.
dc.contributor.authorLiu, H. H.
dc.contributor.authorDasgupta, P. K.
dc.contributor.institutionTEXAS TECH UNIV
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:19:44Z
dc.date.available2014-05-20T15:19:44Z
dc.date.issued1997-06-01
dc.description.abstractA fluorometric technique based on a liquid drop excited from its interior by an optical fiber is described for the measurement of low concentrations of atmospheric hydrogen sulfide (H2S). A drop of alkaline fluorescein mercuric acetate (FMA) solution is suspended in a flowing air sample stream and serves as a renewable sensor. An optical fiber contained within the conduit that forms the drop, brings in the excitation beam; the fluorescence emission is measured by an inexpensive photodiode positioned close to the drop. As H2S in the sample is collected by the alkaline drop, it reacts rapidly with FMA resulting in a significant decrease in fluorescence intensity, proportional to the concentration of H2S sampled. The chemistry of this uniquely selective reaction has been well established for many years, the present technique permits a simple fast inexpensive near real-time measurement with very little reagent consumption. Even without prolonged sampling/preconcentration steps, limits of detection (LODs) in the double digit ppbv range is readily attainable. (C) 1997 Elsevier B.V. B.V.en
dc.description.affiliationTEXAS TECH UNIV,DEPT CHEM & BIOCHEM,LUBBOCK,TX 79409
dc.description.affiliationUNESP,INST QUIM,BR-14800900 ARARAQUARA,SP,BRAZIL
dc.description.affiliationUnespUNESP,INST QUIM,BR-14800900 ARARAQUARA,SP,BRAZIL
dc.format.extent1099-1106
dc.identifierhttp://dx.doi.org/10.1016/S0039-9140(96)02202-3
dc.identifier.citationTalanta. Amsterdam: Elsevier B.V., v. 44, n. 6, p. 1099-1106, 1997.
dc.identifier.doi10.1016/S0039-9140(96)02202-3
dc.identifier.issn0039-9140
dc.identifier.urihttp://hdl.handle.net/11449/31129
dc.identifier.wosWOS:A1997XC19500018
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofTalanta
dc.relation.ispartofjcr4.244
dc.relation.ispartofsjr1,186
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectFMApt
dc.subjectH2Spt
dc.subjectlimit of detectionpt
dc.subjectoptical fiberpt
dc.titleFluorometric fiber optic drop sensor for atmospheric hydrogen sulfideen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes9165109840414837[1]
unesp.author.orcid0000-0003-2046-995X[1]

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