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dc.contributor.authorConstantinou, Elenien
dc.contributor.authorPashalidis, Ioannisen
dc.creatorConstantinou, Elenien
dc.creatorPashalidis, Ioannisen
dc.date.accessioned2019-11-21T06:18:15Z
dc.date.available2019-11-21T06:18:15Z
dc.date.issued2010
dc.identifier.urihttp://gnosis.library.ucy.ac.cy/handle/7/55378
dc.description.abstractThe aim of this study is the radiometric determination of uranium in waters by liquid scintillation counting (LSC) after pre-concentration of the element by cloud point extraction (CPE). For CPE, tributyl phosphate (TBP) is used as the complexing agent and (1,1,3,3-Tetramethylbutyl)phenyl-polyethylene glycol (Triton X-114) as the surfactant. The measurement is performed after phase separation by mixing of the surfactant phase with the liquid scintillation cocktail. The effect of experimental conditions such as pH, reactant ratio (e.g. m(TBP)/m(Triton), ionic strength (e.g. [NaCl]) and the presence of other chemical species (e.g. Ca2+ and Fe3+ ions as well as humic acid and silica colloids) on CPE has been investigated. According to the experimental results the total method efficiency is (13 ± 2)% and the chemical recovery (50 ± 10)% at pH 4 and reactant ratio (V(TBP)/V(Triton) = 0.1). Regarding the other parameters, generally Ca2+ and Fe 3+ ions as well as the presence of colloidal species in solution (even at low concentrations) results in significant decrease of the chemical recovery of uranium. On the other hand increasing NaCl concentration leads to enhancement of chemical recovery. The detection limit under optimum experimental conditions has been found to be 0.5 Bq L-1 indicating that the method could be applied only to waters samples with increased uranium concentration. Moreover, the negative effect of the chemical species found in natural waters limits the applicability of the method with the respect to environmental radioactivity measurements. © 2010 Akadémiai Kiadó, Budapest, Hungary.en
dc.sourceJournal of Radioanalytical and Nuclear Chemistryen
dc.source.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-78449286255&doi=10.1007%2fs10967-010-0752-9&partnerID=40&md5=7fb84a5d049a94bbbc36c3e478e2e593
dc.subjectenvironmental monitoringen
dc.subjectcontrolled studyen
dc.subjectconference paperen
dc.subjectcalibrationen
dc.subjectsodium chlorideen
dc.subjectferric ionen
dc.subjectconcentration (parameters)en
dc.subjectAqueous solutionsen
dc.subjectchemical compositionen
dc.subjectaqueous solutionen
dc.subjectpHen
dc.subjectionic strengthen
dc.subjectprocess optimizationen
dc.subjectcalcium ionen
dc.subjectUraniumen
dc.subjectalpha radiationen
dc.subjectradiometryen
dc.subjecthumic aciden
dc.subjectAlpha radioactivityen
dc.subjectLiquid scintillation countingen
dc.subjectwater analysisen
dc.subjectwater samplingen
dc.subjectsilicon dioxideen
dc.subjectCloud point extractionen
dc.subjectphase separationen
dc.subjecttributyl phosphateen
dc.subjecttriton x 114en
dc.subjectenvironmental radioactivityen
dc.subjectextractionen
dc.titleUranium determination in water samples by liquid scintillation counting after cloud point extractionen
dc.typeinfo:eu-repo/semantics/article
dc.identifier.doi10.1007/s10967-010-0752-9
dc.description.volume286
dc.description.issue2
dc.description.startingpage461
dc.description.endingpage465
dc.author.faculty002 Σχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied Sciences
dc.author.departmentΤμήμα Χημείας / Department of Chemistry
dc.type.uhtypeArticleen
dc.description.notes<p>Cited By :13</p>en
dc.source.abbreviationJ.Radioanal.Nucl.Chem.en
dc.contributor.orcidPashalidis, Ioannis [0000-0002-7587-6395]
dc.gnosis.orcid0000-0002-7587-6395


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