dc.contributor | Universidade Estadual Paulista (UNESP) | |
dc.creator | Petruci, João Flavio da Silveira | |
dc.creator | Cardoso, Arnaldo Alves | |
dc.creator | Wilk, Andreas | |
dc.creator | Kokoric, Vjekoslav | |
dc.creator | Mizaikoff, Boris | |
dc.date | 2015-12-07T15:39:02Z | |
dc.date | 2016-10-25T21:24:00Z | |
dc.date | 2015-12-07T15:39:02Z | |
dc.date | 2016-10-25T21:24:00Z | |
dc.date | 2015-10-06 | |
dc.date.accessioned | 2017-04-06T09:32:15Z | |
dc.date.available | 2017-04-06T09:32:15Z | |
dc.identifier | Analytical Chemistry, v. 87, n. 19, p. 9580-9583, 2015. | |
dc.identifier | 1520-6882 | |
dc.identifier | http://hdl.handle.net/11449/131628 | |
dc.identifier | http://acervodigital.unesp.br/handle/11449/131628 | |
dc.identifier | 10.1021/acs.analchem.5b02731 | |
dc.identifier | 26369573 | |
dc.identifier | http://dx.doi.org/10.1021/acs.analchem.5b02731 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/942168 | |
dc.description | In 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. | |
dc.description | Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) | |
dc.language | eng | |
dc.relation | Analytical Chemistry | |
dc.rights | info:eu-repo/semantics/closedAccess | |
dc.title | iCONVERT: an integrated device for the UV-assisted determination of H2S via mid-infrared gas sensors | |
dc.type | Otro | |