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Content Provider | SpringerLink |
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Author | Dermelj, M. Byrne, A. R. |
Copyright Year | 1997 |
Abstract | The determination of medium and long-lived nuclides can be combined with short-lived ones if a medium or long irradiation is made prior to the short irradiation and radiochemical processing. Thus, an RNAA method previously developed for determination of iodine based on the reaction$^{127}$I(n,γ)$^{128}$I (T $_{1/2}$=25 m) using oxygen flask ignition of the irradiated sample, followed by solvent extraction with an iodine-iodide redox cycle, was combined with an overnight preirradiation to induce the$^{235}$U fission product$^{133}$I (T $_{1/2}$=20.8 h). By reactivating the sample, cooled 1–2 days after the first irradiation, for few minutes both$^{128}$I and$^{133}$I could be quantified in the separated iodine fraction. Non-combustible inorganic materials (e.g., sediment, soil, etc.) can be successfully ignited after mixing with excess cellulose powder. Chemical yields for iodine were determined spectrophotometrically in the organic phase, while homogeneously spiked Whatman cellulose powder was used as uranium standard. Mercury is also released on ignition and collected in the absorbing solution, from where it was separated by toluene extraction. Its chemical yield was determined for each aliquot using$^{203}$Hg tracer and counting on an LEPD. Results for some suitable SRMs are presented, and the general features of the double irradiation technique discussed. |
Starting Page | 13 |
Ending Page | 18 |
Page Count | 6 |
File Format | |
ISSN | 02365731 |
Journal | Journal of Radioanalytical and Nuclear Chemistry |
Volume Number | 216 |
Issue Number | 1 |
e-ISSN | 15882780 |
Language | English |
Publisher | Kluwer Academic Publishers |
Publisher Date | 1997-01-01 |
Publisher Place | Dordrecht |
Access Restriction | Subscribed |
Subject Keyword | Inorganic Chemistry Physical Chemistry Diagnostic Radiology Nuclear Physics, Heavy Ions, Hadrons Nuclear Chemistry |
Content Type | Text |
Resource Type | Article |
Subject | Radiology, Nuclear Medicine and Imaging Health, Toxicology and Mutagenesis Nuclear Energy and Engineering Pollution Public Health, Environmental and Occupational Health Spectroscopy Analytical Chemistry |
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