Constant current anodic stripping chronopotentiometric determination of uranium in uranium mineral ores via accumulation of K_2UO _2[Fe(CN)_6] on the palladium plated aluminum electrode

摘要

In the present work the uranyl hexacyanoferrate (K_2UO _2[Fe(CN)_6]) is deposited on the palladized aluminum (Pd-Al) electrode from a + {ext{Fe}}left({ext{CN}} ight)-{6}{ - 3} solution. Then the anodic stripping chronopotentiometry (ASCP) was used to strip the K_2UO_2[Fe(CN)_6] from the Pd-Al surface. The operational conditions including: pH, K_3Fe(CN)_6 concentration, deposition potential, deposition time and stripping current were optimized. The ASCP calibration graph was linear in concentration range 10-460 μM. of {ext{UO}}-{2}{2 + } and the detection limit was 8.5 μM. The interference of some concomitant ions during the deposition process of K _2UO_2[Fe(CN)_6] was studied. The proposed method was successfully applied for analysis of some uranium mineral ores.