Cathodic Action of the Uranyl-EDTA Complex at the Dropping Mercury Electrode

Journal Article · Tue Aug 01 04:00:00 EDT 1961 · Analytical Chemistry

DOI:https://doi.org/10.1021/ac60177a021· OSTI ID:4024321

Lai, T. T.; Chang, T. L.

The polarographic behavior of the uranyl-(ethylenedinitrilo)tetraacetate complex was studied over the pH range 3.3 to 9.3. A reversible wave corresponding tc the reduction of the uranyl complex to the U(V) state was obtained in the range. The half-wave potential was found to be independent of pH from 5.7 tc 6.8 and equal tc -0.37 volt vs SCE; outside the range the half-wave potential is pHdependent, and it is shown that one hydrogen or hydroxyl ion is involved in the reduction. lt was proved that U(VI) has one more ligand attached than U(V) in the pH range from 3.3 to 6.8, but has the same number of ligands between 6.8 and 9.3. The diffusion current is proportional tc concentration of uranyl ion from 2.20 x 10/sup -4/M tc 2.4 x 10/sup -3/M. The diffusion current constant is 2.18 for 7.13 x 10/sup -2/M Versene at pH 5.50 and the diffusion coefficient is 1.30 x 10/sup -5/ cm/sup 2/ per second. (auth)

• Research Organization: Cheng Kung Univ., Tainan, Taiwan
• Sponsoring Organization: USDOE
• NSA Number: NSA-15-024815
• OSTI ID: 4024321
• Journal Information: Analytical Chemistry, Journal Name: Analytical Chemistry Journal Issue: 9 Vol. 33; ISSN 0003-2700
• Publisher: American Chemical Society (ACS)
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACETATES
ACIDITY
BEHAVIOR
CATHODES
CHEMISTRY
COMPLEXES
DIFFUSION
ELECTRODES
ETHYLENE
HYDROGEN
MERCURY
ORGANIC NITROGEN COMPOUNDS
POLAROGRAPHY
URANIUM COMPLEXES
URANYL COMPOUNDS