Bibliographic Citation
| Document | For copies of Journal Articles, please contact the Publisher or your local public or university library and refer to the information in the Resource Relation field. For copies of other documents, please see the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or Document Availability. |
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| Title | Cyclic voltammetric behavior of uranyl ion in sulfuric acid solutions. Application to some nuclear materials characterization |
| Creator/Author | Casadio, S. ; Lorenzini, L. |
| Publication Date | 1973 Jan 01 |
| OSTI Identifier | OSTI ID: 4399838 |
| Other Number(s) | CODEN: ANALB |
| Resource Type | Journal Article |
| Resource Relation | Anal. Lett., v. 6, no. 9, pp. 809-820 |
| Research Org | CNEN, Rome |
| Subject | N40120 --Chemistry--Analytical & Separations Chemistry--Chemical & Spectral Procedures; URANIUM-- VOLTAMETRY;CATIONS;ELECTRODES;ELECTROLYTES;MERCURY;PHOSPHORIC ACID;POTASSIUM SULFATES;QUANTITATIVE CHEMICAL ANALYSIS;REDUCTION;SULFURIC ACID;URANYL COMPOUNDS;VALENCE ; Descriptor Groups (Splits): ;THORIUM COMPOUNDS-- URANIUM COMPOUNDS; ;URANIUM OXIDES |
| Description/Abstract | U(VI) reduction at the mercury electrode in H/sub 2/SO/sub 4/ solutions was examined by cyclic voltametry.A diffusion coefficient, D, of (5.30 plus or minus 0.08) x 10/sup -6/ cm/sup 2//sec was obtained for the depolarizer at 25.0 plus or minus 0.2 deg C in 1N K/sub 2/SO/sub 4/ (pH = 2).In 1N K deg SO4/1N H/sub 2/SO/s ub 4/ systems the disproportionation of U(V) was found to occur with the constant rate of K/sub d//STAH/sup +/! = 6.500 plus or minus 1.000 M/sup -2/sec/sup -1/.In 1M H/sub 2/SO/sub 4/ supporting electrolyte pure kinetic control was achieved over the range of scan rates and uranyl concentration (C) investigated, hence linear correlation bctween cathodic peak current and C (above 5 x 10/sup -6/ M) was obtained.Strong complexing oxyanions, such as phosphate and pyrosulphate, do not interfere with the cathodic peak current.Rapid determination of O/U ratios in uranium oxides and of U in mixed U--Th materials were performed respectively in 1M H/sub 2/SO/sub 4// 1.5M H/sub 3/PO/sub 4/ and 1M H/sub 2/SO/sub 4//0.2M K/sub 2/S/sub 2/O/sub 4/ su pporting media, with a reproducibility of plus or minus 1.3%, standard deviation.(auth) |
| Country of Publication | Italy |
| Language | English |
| System Entry Date | 2001 Jun 03 |
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Last Updated: 02/09/2009