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Indirect Determination of Uranium Traces by Adsorptive Stripping Voltammetry with Arsenazo III
Author(s) -
Komersová Alena,
Bartoš Martin,
Kalcher Kurt,
Vytrˇas Karel
Publication year - 1998
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/(sici)1521-4109(199805)10:6<442::aid-elan442>3.0.co;2-r
Subject(s) - adsorptive stripping voltammetry , uranium , hanging mercury drop electrode , chemistry , reagent , detection limit , supporting electrolyte , stripping (fiber) , electrolyte , voltammetry , adsorption , mercury (programming language) , nuclear chemistry , inorganic chemistry , chromatography , electrode , electrochemistry , materials science , organic chemistry , composite material , computer science , metallurgy , programming language
Trace concentrations of uranium were determined indirectly using adsorptive stripping voltammetry with Arsenazo III. The current response was characterized with respect to pH, concentration of the reagent in a supporting electrolyte, accumulation time and accumulation potential. Optimum conditions included a supporting electrolyte of 0.1 M KCl + HCl (pH 1.8) containing Arsenazo III (5.7 × 10 −7 mol/L), an accumulation potential of 0 V (vs. SCE), and a scan range from −0.4 V to 0 V using a hanging mercury drop electrode. With an accumulation period of 120 s, a detection limit of 1 × 10 −8 mol/L of uranium was obtained. The proposed method was applied for the determination of uranium traces in water and soil samples.