UV photochemical vapor generation–atomic fluorescence spectrometric determination of conventional hydride generation elements

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DOIResolve DOI: http://doi.org/10.1016/j.microc.2009.09.010
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TypeArticle
Journal titleMicrochemical Journal
ISSN0026-265X
Volume95
Issue1
Pages3237; # of pages: 6
SubjectAtomic fluorescence spectrometry; Photochemical vapor generation; Hydride generation; Sample introduction
AbstractA systematic investigation of UV photochemical vapor generation (photo-CVG) and its potential application for seven typical hydride-forming elements (As, Sb, Bi, Te, Sn, Pb and Cd) when combined with atomic fluorescence spectrometry (AFS) detection is presented. These analyte ions were converted to volatile species following UV irradiation of their aqueous solution to which low molecular weight organic acids (such as formic, acetic or propionic acid) had been added, and introduced to an atomic fluorescence spectrometer for subsequent analytical measurements. The experimental conditions for photo-CVG and the interferences arising from concomitant elements were carefully investigated. Limits of detection as low as 0.08, 0.1, 0.2 and 0.5 ng mL−¹ were obtained for Te, Bi, Sb and As, respectively, comparable to those by hydride generation–AFS. The RSDs obtained with the proposed method for these elements were better than 5% at 50 ng mL−¹. It is noteworthy that the presence of TiO₂ nanoparticles combined with UV irradiation remarkably enhances the CVG efficiencies of Se(VI) and Te(VI), which cannot form hydrides with KBH4/NaBH4. Moreover, photo-CVG has a greater tolerance toward interferences arising from transition elements than hydride generation, and this facilitates its application to the analysis of complicated sample matrices.
Publication date
LanguageEnglish
AffiliationNRC Institute for National Measurement Standards; National Research Council Canada
Peer reviewedYes
IdentifierS0026265X09001374
NPARC number21277191
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Record identifier8ca752a6-5176-4d23-a3bc-c200d19cae1c
Record created2016-01-05
Record modified2016-05-09
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