A hydride generation flow system for determination of arsenic and selenium by total reflection X-ray fluorescence spectrometry

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorGomes, ACF
dc.creatorMenegario, A. A.
dc.creatorPellegrinotti, D. C.
dc.creatorGine, M. F.
dc.creatorNascimento, V. F.
dc.date2014-05-20T15:27:37Z
dc.date2016-10-25T18:02:29Z
dc.date2014-05-20T15:27:37Z
dc.date2016-10-25T18:02:29Z
dc.date2004-09-20
dc.date.accessioned2017-04-06T00:03:01Z
dc.date.available2017-04-06T00:03:01Z
dc.identifierSpectrochimica Acta Part B-atomic Spectroscopy. Oxford: Pergamon-Elsevier B.V., v. 59, n. 9, p. 1481-1484, 2004.
dc.identifier0584-8547
dc.identifierhttp://hdl.handle.net/11449/37572
dc.identifierhttp://acervodigital.unesp.br/handle/11449/37572
dc.identifier10.1016/j.sab.2004.06.007
dc.identifierWOS:000224589900016
dc.identifierhttp://dx.doi.org/10.1016/j.sab.2004.06.007
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/880855
dc.descriptionIn this work, a preconcentration and separation system based on continuous flow hydride generation is proposed to improve the determination of As and Se by total reflection X-ray fluorescence spectrometry. The generated hydrides are continuously separated from the liquid phase and collected in a chamber containing 250 mul of HCI/HNO3 1:1 (v/v) solution. Hydride generation conditions and collection of the hydrides were evaluated. Under optimised conditions, enrichment factors of 55 for As and 82 for Se were attained. Detection limits of 0.3 mug l(-1) for As and Se were obtained when 20 ml of sample was used. Analysis of a natural water standard reference material from National Institute of Standard and Technology (SRM-1640) was in agreement with the certified values at the 95% confidence level. (C) 2004 Elsevier B.V. All rights reserved.
dc.languageeng
dc.publisherElsevier B.V.
dc.relationSpectrochimica Acta Part B-atomic Spectroscopy
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectTXRF
dc.subjecthydride generation
dc.subjectflow system
dc.subjectpreconcentration
dc.titleA hydride generation flow system for determination of arsenic and selenium by total reflection X-ray fluorescence spectrometry
dc.typeOtro


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