iCONVERT: an integrated device for the UV-assisted determination of H2S via mid-infrared gas sensors

Página do item simplificado
dc.contributor.authorPetruci, João Flavio da Silveira [UNESP]
dc.contributor.authorCardoso, Arnaldo Alves [UNESP]
dc.contributor.authorWilk, Andreas
dc.contributor.authorKokoric, Vjekoslav
dc.contributor.authorMizaikoff, Boris
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversity of Ulm
dc.date.accessioned2015-12-07T15:39:02Z
dc.date.available2015-12-07T15:39:02Z
dc.date.issued2015-10-06
dc.description.abstractIn this technical note, we describe an integrated device platform for performing in-flow gaseous conversion reactions based on ultraviolet (UV) irradiation. The system combines, using the same footprint, an integrated UV-conversion device (iCONVERT), a preconcentrator unit (iPRECON), and a new generation of mid-infrared (MIR) gas cell simultaneously serving as a photon conduit, i.e., so-called substrate-integrated hollow waveguide (iHWG) optically coupled to a compact Fourier transform-infrared (FT-IR) spectrometer. The iCONVERT is assembled from two blocks of aluminum (dimensions, 75 mm × 50 mm × 40 mm; L × W × D) containing 4 miniaturized UV-lamps (47mm × 6 mm × 47 mm each). For the present study, the iPRECON-iCONVERT-iHWG sensing platform has specifically been tailored to the determination of H2S in gaseous samples. Thereby, the quantitative UV-assisted conversion of the rather weak IR-absorber H2S into the more pronouncedly responding SO2 is used for hydrogen sulfide detection. A linear calibration model was established in the range of 7.5 to 100 ppmv achieving a limit of detection at 1.5 ppmv using 10 min of sample preconcentration (onto Molecular Sieve 5A) at a flow rate of 200 mL min(-1). When compared to a conventional UV-conversion system, the iCONVERT revealed similar performance. Considering the potential for system miniaturization using, e.g., dedicated quantum cascade lasers (QCL) in lieu of the FT-IR spectrometer, the developed sensing platform may be further evolved into a hand-held device.en
dc.description.affiliationSão Paulo State University (UNESP), Department of Analytical Chemistry, CEP 14800-970, Araraquara, São Paulo, Brazil
dc.description.affiliationUniversity of Ulm , Institute of Analytical and Bioanalytical Chemistry, 89081, Ulm, Germany.
dc.description.affiliationUnespSão Paulo State University (UNESP), Department of Analytical Chemistry, CEP 14800-970, Araraquara, São Paulo, Brazil.
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 2014/23974-3
dc.format.extent9580-9583
dc.identifierhttp://dx.doi.org/10.1021/acs.analchem.5b02731
dc.identifier.citationAnalytical Chemistry, v. 87, n. 19, p. 9580-9583, 2015.
dc.identifier.doi10.1021/acs.analchem.5b02731
dc.identifier.issn1520-6882
dc.identifier.lattes9165109840414837
dc.identifier.pubmed26369573
dc.identifier.urihttp://hdl.handle.net/11449/131628
dc.language.isoeng
dc.relation.ispartofAnalytical Chemistry
dc.relation.ispartofsjr2,362
dc.rights.accessRightsAcesso restrito
dc.sourcePubMed
dc.titleiCONVERT: an integrated device for the UV-assisted determination of H2S via mid-infrared gas sensorsen
dc.typeArtigo
unesp.author.lattes9165109840414837[2]
unesp.author.orcid0000-0003-2046-995X[2]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

Arquivos

Coleções

Artigos - Química Analítica - IQ