@prefix prodottidellaricerca: . @prefix istituto: . @prefix prodotto: . istituto:CDS063 prodottidellaricerca:prodotto prodotto:ID39022 . @prefix pubblicazioni: . @prefix unitaDiPersonaleInterno: . unitaDiPersonaleInterno:MATRICOLA4695 pubblicazioni:autoreCNRDi prodotto:ID39022 . @prefix rdf: . prodotto:ID39022 rdf:type prodotto:TIPO1101 . @prefix retescientifica: . prodotto:ID39022 rdf:type retescientifica:ProdottoDellaRicerca . @prefix rdfs: . prodotto:ID39022 rdfs:label "The relation of double peaks, observed in quartz hydride atomizers, to the fate of free analyte atoms in the determination of arsenic and selenium by atomic absorption spectrometry (Articolo in rivista)"@en . @prefix xsd: . prodotto:ID39022 pubblicazioni:anno "2002-01-01T00:00:00+01:00"^^xsd:gYear ; pubblicazioni:doi "10.1016/S0584-8547(02)00165-9"^^xsd:string . @prefix skos: . prodotto:ID39022 skos:altLabel "
D'Ulivo A., Dedina J. (2002)
The relation of double peaks, observed in quartz hydride atomizers, to the fate of free analyte atoms in the determination of arsenic and selenium by atomic absorption spectrometry
in Spectrochimica acta. Part B, Atomic spectroscopy
"^^rdf:HTML ; pubblicazioni:autori "D'Ulivo A., Dedina J."^^xsd:string ; pubblicazioni:paginaInizio "2069"^^xsd:string ; pubblicazioni:paginaFine "2079"^^xsd:string ; pubblicazioni:numeroVolume "57"^^xsd:string . @prefix ns10: . prodotto:ID39022 pubblicazioni:rivista ns10:ID409912 ; skos:note "ISI Web of Science (WOS)"^^xsd:string ; pubblicazioni:affiliazioni "CNR, Istituto per i processi chimico-fisici\nAVCR, Inst. Analytical Chemistry, Praha"^^xsd:string ; pubblicazioni:titolo "The relation of double peaks, observed in quartz hydride atomizers, to the fate of free analyte atoms in the determination of arsenic and selenium by atomic absorption spectrometry"^^xsd:string ; prodottidellaricerca:abstract "The mechanism at the origin of double peaks formation in quartz hydride atomizers were investigated by continuous flow hydride generation atomic absorption spectrometry. Arsenic and selenium were used as model analytes. The effect of atomization mode (flame-in-gas-shield (FIGS), miniature diffusion flame and double flame (DF)) and some experimental parameters as oxygen supply rate for microflame and the distance from atomization to free atoms detection point, were investigated on the shape of both analytical signals and calibration graphs. Rollover of calibration graphs and double peak formation are strictly related each to the other and could be observed only in FIGS atomizer mode under some particular conditions. A mechanism based on incomplete atomization of hydrides cannot explain the collected experimental evidences because the microflame of FIGS is able to produce quantitative atomization of large amount of hydrides even at supply rate of oxygen close to extinction threshold of microflame. The heterogeneous gas-solid reactions between finely dispersed particles, formed by free atom recombination, and the free atoms in the gaseous phase are at the origin of double peak formation. (C) 2002 Elsevier Science B.V. All rights reserved." ; prodottidellaricerca:prodottoDi istituto:CDS063 ; pubblicazioni:autoreCNR unitaDiPersonaleInterno:MATRICOLA4695 . ns10:ID409912 pubblicazioni:rivistaDi prodotto:ID39022 .