Adsorptive Stripping Voltammetric Measurements of Trace Uranium at the Bismuth Film Electrode

Journal Article · Mon Apr 11 00:00:00 EDT 2005 · Analytica Chimica Acta

DOI:https://doi.org/10.1016/j.aca.2004.12.003· OSTI ID:15015963

Lin, L; Thongngamdee, Sompong; Wang, Joseph; Lin, Yuehe; Sadik, O A; Ly, Suw-Young

Bismuth-coated carbon-fiber electrodes have been successfully applied for adsorptive-stripping voltammetric measurements of trace uranium in the presence of cupferron. The new protocol is based on the accumulation of the uranium-cupferron complex at a preplated bismuth film electrode held at -0.30 V (vs. Ag/AgCl), followed by a negatively-sweeping square-wave voltammetric waveform. Factors influencing the stripping performance, including the film preparation, solution pH, cupferron concentration, adsorption potential and time have been optimized. The resulting performance compares well with that observed for analogous measurements at mercury film electrodes. A detection limit of 0.3 μg/L is obtained in connection to a 10 min adsorption time. The response is linear up to 50 μg/L and the relative standard deviation at 50 μg/L uranium is 3.8% (n = 15; 2 min adsorption). Potential interferences are examined. Applicability to sea water samples is demonstrated. The attractive behavior of the new “mercury-free” uranium sensor holds great promise for on-site environmental and industrial monitoring of uranium.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 15015963
• Report Number(s): PNNL-SA-43109; ACACAM; 6899; KP1302000; TRN: US0501658
• Journal Information: Analytica Chimica Acta, Vol. 535, Issue 1-2; ISSN 0003-2670
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
ADSORPTION
BISMUTH
CUPFERRON
ELECTRODES
MERCURY
MONITORING
PERFORMANCE
SENSITIVITY
URANIUM
SEAWATER
VOLTAMETRY
TRACE AMOUNTS
Uranium
electrochemical sensor
bismuth film electrode
uranium
cupferron
adsorptive-cathodic stripping voltammetry
complexes
chromatography
absorption
water
spectroscopy
Environmental Molecular Sciences Laboratory