Determination of Cd, Cu, and Pb after cloud point extraction using multielemental sequential determination by thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS)

dc.creatorCoelho, LM
dc.creatorBezerra, MA
dc.creatorArruda, MAZ
dc.creatorBruns, RE
dc.creatorFerreira, SLC
dc.date2008
dc.dateMAR
dc.date2014-07-30T14:39:01Z
dc.date2015-11-26T17:37:24Z
dc.date2014-07-30T14:39:01Z
dc.date2015-11-26T17:37:24Z
dc.date.accessioned2018-03-29T00:19:04Z
dc.date.available2018-03-29T00:19:04Z
dc.identifierSeparation Science And Technology. Taylor & Francis Inc, v. 43, n. 4, n. 815, n. 827, 2008.
dc.identifier0149-6395
dc.identifierWOS:000254394700007
dc.identifier10.1080/01496390701870630
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/61363
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/61363
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1285952
dc.descriptionIn the present paper a procedure for simultaneous preconcentration of Cd, Cu, and Pb using cloud point extraction (CPE) and multielemental sequential determination by thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS) is proposed. This preconcentration procedure is based on the metals extraction into micellar media of octylphenoxypolythoxyethanol (Triton X-114) after their reaction with 1-(2-pyridylazo)-2-naphtol (PAN). A Box-Behnken design was used to optimize the variables (pH, buffer concentration and volume of NaCl) involved in the extraction procedure. Enrichment factors were calculated as the ratio between the slopes of calibration equations with and without the preconcentration procedure in the TS-FF-AAS, with values of 59, 25, and 21 respectively for Cd, Cu, and Pb. Limits of detection (LOD) (3s(b), n = 10) were also calculated as 0.025, 0.38, and 0.43 mu g L(-1) to Cd, Cu, and Pb, respectively. The precision (repeatability) expressed as relative standard deviation (RSD, n = 10) for reference standards of 10.0 and 20.0 mu g L(-1) were 6.1 and 4.5% for Cd, 7.2 and 3.4% for Cu and 5.2 and 8.7% for Pb. The accuracy was confirmed through the analysis of certified reference material (NIST 1643d, Trace elements in water). The developed procedure was also applied to Cd, Cu, and Pb determinations in mineral water samples.
dc.description43
dc.description4
dc.description815
dc.description827
dc.languageen
dc.publisherTaylor & Francis Inc
dc.publisherPhiladelphia
dc.publisherEUA
dc.relationSeparation Science And Technology
dc.relationSep. Sci. Technol.
dc.rightsfechado
dc.rightshttp://journalauthors.tandf.co.uk/permissions/reusingOwnWork.asp
dc.sourceWeb of Science
dc.subjectcloud point extraction
dc.subjectTS-FF-AAS
dc.subjectsequential multielemental determination
dc.subjectOnline Preconcentration System
dc.subjectCadmium Determination
dc.subjectBiological Samples
dc.subjectLead Determination
dc.subjectDoehlert Matrix
dc.subjectOptimization
dc.subjectZn
dc.subjectSeparation
dc.subjectDesign
dc.subjectWater
dc.titleDetermination of Cd, Cu, and Pb after cloud point extraction using multielemental sequential determination by thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS)
dc.typeArtículos de revistas


Este ítem pertenece a la siguiente institución