Sequential spectrophotometric determination of chromium(III) and chromium(VI) using flow injection analysis

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorDe Andrade, João Carlos
dc.creatorRochat, Julio Cesar
dc.creatorBaccan, Nivaldo
dc.date2014-05-27T00:35:18Z
dc.date2016-10-25T18:12:01Z
dc.date2014-05-27T00:35:18Z
dc.date2016-10-25T18:12:01Z
dc.date1985-12-01
dc.date.accessioned2017-04-06T00:40:34Z
dc.date.available2017-04-06T00:40:34Z
dc.identifierThe Analyst, v. 110, n. 2, p. 197-199, 1985.
dc.identifier0003-2654
dc.identifierhttp://hdl.handle.net/11449/63730
dc.identifierhttp://acervodigital.unesp.br/handle/11449/63730
dc.identifier10.1039/AN9851000197
dc.identifier2-s2.0-2542529820
dc.identifierhttp://dx.doi.org/10.1039/AN9851000197
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/885705
dc.descriptionA flow injection analysis (FIA) procedure for the speciation of Cr(III) and Cr(VI) using the 1,5-diphenylcarbazide (DPC) method is presented. As Cr(III) does not interfere in the Cr(VI) - DPC reaction, both Cr(VI) and total chromium [after the on-line oxidation of Cr(III) by Ce(IV)] are sequentially determined. Cr(III) is obtained by difference. Under the experimental conditions described, the calibration graphs are linear up to 2 μg mh1 of Cr(VI) and 4 μg ml-1 of Cr(III). The detection limits found were 18 ng ml -1 for Cr(VI) and 55 ng ml-1 for Cr(III), at a signal to noise ratio of 3. The common interfering elements in the Cr(VI) - DPC reaction were investigated under dynamic FIA conditions. The FIA method was also compared with the conventional spectrophotometric procedure.
dc.languageeng
dc.relationThe Analyst
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectChromium determination
dc.subjectChromium speciation
dc.subjectFlow injection analysis
dc.subjectSpectrophotometry
dc.titleSequential spectrophotometric determination of chromium(III) and chromium(VI) using flow injection analysis
dc.typeOtro


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