dc.contributor | Universidade Estadual de Campinas (UNICAMP) | |
dc.contributor | Universidade Estadual Paulista (Unesp) | |
dc.date.accessioned | 2014-05-27T00:35:18Z | |
dc.date.accessioned | 2022-10-05T17:23:24Z | |
dc.date.available | 2014-05-27T00:35:18Z | |
dc.date.available | 2022-10-05T17:23:24Z | |
dc.date.created | 2014-05-27T00:35:18Z | |
dc.date.issued | 1985-12-01 | |
dc.identifier | The Analyst, v. 110, n. 2, p. 197-199, 1985. | |
dc.identifier | 0003-2654 | |
dc.identifier | http://hdl.handle.net/11449/63730 | |
dc.identifier | 10.1039/AN9851000197 | |
dc.identifier | 2-s2.0-2542529820 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/3913914 | |
dc.description.abstract | A 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.language | eng | |
dc.relation | The Analyst | |
dc.relation | 3.864 | |
dc.relation | 1,249 | |
dc.rights | Acesso restrito | |
dc.source | Scopus | |
dc.subject | Chromium determination | |
dc.subject | Chromium speciation | |
dc.subject | Flow injection analysis | |
dc.subject | Spectrophotometry | |
dc.title | Sequential spectrophotometric determination of chromium(III) and chromium(VI) using flow injection analysis | |
dc.type | Artigo | |