Use of the internal standardization for difficult sampling by graphite furnace atomic absorption spectrometry

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorOliveira, Adriana P.
dc.creatorGomes Neto, José Anchieta
dc.creatorNóbrega, Joaquim A.
dc.creatorOliveira, Pedro V.
dc.date2014-05-27T11:21:10Z
dc.date2016-10-25T18:19:57Z
dc.date2014-05-27T11:21:10Z
dc.date2016-10-25T18:19:57Z
dc.date2004-10-08
dc.date.accessioned2017-04-06T01:10:32Z
dc.date.available2017-04-06T01:10:32Z
dc.identifierTalanta, v. 64, n. 2, p. 334-337, 2004.
dc.identifier0039-9140
dc.identifierhttp://hdl.handle.net/11449/67902
dc.identifierhttp://acervodigital.unesp.br/handle/11449/67902
dc.identifier10.1016/j.talanta.2004.02.032
dc.identifierWOS:000223778300010
dc.identifier2-s2.0-4143061707
dc.identifierhttp://dx.doi.org/10.1016/j.talanta.2004.02.032
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/889300
dc.descriptionThis work shows the potentiality of As as internal standard to compensate errors from sampling of sparkling drinking water samples in the determination of selenium by graphite furnace atomic absorption spectrometry. The mixture Pd(NO 3) 2/Mg(NO 3) 2 was used as chemical modifier. All samples and reference solutions were automatically spiked with 500 μg l -1 As and 0.2% (v/v) HNO 3 by the autosampler, eliminating the need for manual dilutions. For 10 μl dispensed sample into the graphite tube, a good correlation (r=0.9996) was obtained between the ratio of analyte absorbance by the internal standard absorbance and the analyte concentrations. The relative standard deviations (R.S.D.) of measurements varied from 0.05 to 2% and from 1.9 to 5% (n=12) with and without internal standardization, respectively. The limit of detection (LD) based on integrated absorbance was 3.0 μg l -1 Se. Recoveries in the 94-109% range for Se spiked samples were obtained. Internal standardization (IS) improved the repeatability of measurements and increased the lifetime of the graphite tube in ca. 15%. © 2004 Elsevier B.V. All rights reserved.
dc.languageeng
dc.relationTalanta
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectComplex matrices
dc.subjectGraphite furnace atomic absorption spectrometry
dc.subjectInternal standardization
dc.subjectSparkling waters
dc.subjectAbsorption
dc.subjectArsenic
dc.subjectConcentration (process)
dc.subjectFurnaces
dc.subjectPotable water
dc.subjectStandardization
dc.subjectAtomic absorption spectrometry
dc.subjectChemical modifiers
dc.subjectGraphite furnace
dc.subjectGraphite
dc.subjectarsenic
dc.subjectgraphite
dc.subjectmagnesium nitrate
dc.subjectnitric acid derivative
dc.subjectpalladium complex
dc.subjectselenium
dc.subjectunclassified drug
dc.subjectabsorption
dc.subjectatomic absorption spectrometry
dc.subjectcorrelation analysis
dc.subjectdilution
dc.subjectelectrochemical analysis
dc.subjectreproducibility
dc.subjectsampling
dc.subjecttemperature sensitivity
dc.titleUse of the internal standardization for difficult sampling by graphite furnace atomic absorption spectrometry
dc.typeOtro


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