dc.contributor.author | Gürkan R. | |
dc.contributor.author | Akçay M. | |
dc.date.accessioned | 2019-07-27T12:10:23Z | |
dc.date.accessioned | 2019-07-28T09:12:59Z | |
dc.date.available | 2019-07-27T12:10:23Z | |
dc.date.available | 2019-07-28T09:12:59Z | |
dc.date.issued | 2003 | |
dc.identifier.issn | 0026265X | |
dc.identifier.uri | https://dx.doi.org/10.1016/S0026-265X(03)00049-3 | |
dc.identifier.uri | https://hdl.handle.net/20.500.12418/4564 | |
dc.description.abstract | A simple and sensitive catalytic spectrophotometric method was developed for the determination of trace amounts of selenium. The method is based on the catalytic effect of selenium in form Se(IV) on the reduction of Maxilon Blue-SG by sodium sulfide. Indicator reaction is followed spectrophotometrically by measuring the absorbance change at ?max=654 nm and constant temperature (30.0±0.1°C) by fixed time method. Selenium could quantitatively be determined in the range 0.004-0.200 ?g ml-1 Se(IV) with a detection limit of 0.205 ng ml-1 Se(IV). All of the variables that affected the reaction rate were investigated and established optimum conditions to give maximum sensitivity. The R.S.D.s of the method (N=12) for the Se(IV) concentrations of 0.004, 0.016, 0.040 and 0.160 ?g ml-1 are between 2.27 and 0.32%, respectively, and depended on Se(IV) concentration. The interference effect of various anion and cations on the Se(IV) determination was also fully studied. The selectivity of catalytic reaction was greatly improved with the use of the strong cation exchange resin. The developed kinetic-catalytic reaction was applied to the determination of selenium in real samples as Antioxidant-S, Selsun (which is a healthcare product for the treatment of dandruff) and analytical grade sodium metabisulfite, and in spring water samples without any pre-concentration. The acceptable recoveries were obtained by the method for appropriate standard Se(IV) additions. The method is simple, practical and suitable for using in small laboratories owing to its precision, sensitivity and relative selectivity. © 2003 Elsevier Science B.V. All rights reserved. | en_US |
dc.description.sponsorship | Financial support of this work was provided by University of Cumhuriyet, Research Fund Accountant Office under doctorate thesis project with F-89 code. The authors are grateful to the Authorities of Analytical Chemistry Section of University of Cumhuriyet, Turkey for providing laboratory facilities to do this work concerning this project. We are especially indebted to the authorities of the University of Cumhuriyet Research Fund Accountant Office for their generous help in supplying all chemicals (as indicator dye and other chemical reagents). | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Elsevier Inc. | en_US |
dc.relation.isversionof | 10.1016/S0026-265X(03)00049-3 | en_US |
dc.rights | info:eu-repo/semantics/closedAccess | en_US |
dc.subject | Fixed-time method | en_US |
dc.subject | Kinetic-catalytic method | en_US |
dc.subject | Maxilon blue-SG | en_US |
dc.subject | Selenium | en_US |
dc.subject | Spectrophotometry | en_US |
dc.subject | Spring water | en_US |
dc.title | Kinetic spectrophotometric determination of trace amounts of selenium based on the catalytic reduction of maxilon blue-SG by sulfide | en_US |
dc.type | article | en_US |
dc.relation.journal | Microchemical Journal | en_US |
dc.contributor.department | Gürkan, R., Department of Chemistry, Science and Arts of Faculty, University of Cumhuriyet, Sivas 58140, Turkey -- Akçay, M., Department of Chemistry, Science and Arts of Faculty, University of Cumhuriyet, Sivas 58140, Turkey | en_US |
dc.identifier.volume | 75 | en_US |
dc.identifier.issue | 1 | en_US |
dc.identifier.endpage | 49 | en_US |
dc.identifier.startpage | 39 | en_US |
dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | en_US |