Determination of trace amounts of selenium in natural spring waters and tea samples by catalytic kinetic spectrophotometry

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dc.contributor.authorGürkan, Ramazan
dc.contributor.authorGürkan, Nevalnur Zeynep
dc.date.accessioned2024-10-26T17:52:50Z
dc.date.available2024-10-26T17:52:50Z
dc.date.issued2019
dc.departmentSivas Cumhuriyet Üniversitesi
dc.description.abstractIn this work, a new kinetic method is described for the determination of trace Se(IV) in natural spring waters and commercial tea samples. The method is based on the activation of Se(IV) onto the indicator reaction in acidic medium. The reaction was monitored using a fixed time approach of 20 min at 680 nm. The variables affecting the reaction rate were evaluated and optimized. The method allows the determination of Se(IV) in the range of 0.0125-1.0 mg L-1 with a detection limit of 3.6 µg L-1. The precision was in range of 0.63-3.15% (as RSD %) with a higher recovery than 98.6%. The method has been found to be selective against matrix effect. The method was applied to the speciation analysis of inorganic Se species present in the selected samples. The method was statistically validated by analysis of two certified samples and comparing the obtained results to those of HG-AAS analysis. Also, the total Se levels of the samples were determined by using both methods after conversion of Se(VI) into Se(IV) in ultrasonic bath in acidic medium for 30 min at 85-90 °C. The results were in good agreement with those of HG-AAS. The Se(VI) level of the samples was calculated from the difference between amounts of total Se and Se(IV). © 2019 Atlantis Livros Ltda.. All rights reserved.
dc.description.sponsorshipCommission of Scientific Research Projects, University of Cumhuriyet, (F-228)
dc.identifier.doi10.26850/1678-4618eqj.v44.4.2019.p57-72
dc.identifier.endpage72
dc.identifier.issn0100-4670
dc.identifier.issue4
dc.identifier.scopus2-s2.0-85073153504
dc.identifier.scopusqualityQ4
dc.identifier.startpage57
dc.identifier.urihttps://doi.org/10.26850/1678-4618eqj.v44.4.2019.p57-72
dc.identifier.urihttps://hdl.handle.net/20.500.12418/26547
dc.identifier.volume44
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherAtlantis Livros Ltda.
dc.relation.ispartofEcletica Quimica
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectCatalytic kinetic spectrophotometry; Hypophosphite; Inorganic selenium; Natural spring water; Phosphomolybdic acid; Tea samples
dc.titleDetermination of trace amounts of selenium in natural spring waters and tea samples by catalytic kinetic spectrophotometry
dc.typeArticle

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