The effect of sample matrix quenching on the measurement of trace uranium concentrations in aqueous solutions using kinetic phosphorimetry
| Autor: | A. G. Sowder, Sue B. Clark, Robert A. Fjeld |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Detection limit
Aqueous solution Quenching (fluorescence) Health Toxicology and Mutagenesis Public Health Environmental and Occupational Health Analytical chemistry chemistry.chemical_element Uranium Uranyl Pollution Analytical Chemistry Dilution chemistry.chemical_compound Nuclear Energy and Engineering chemistry Radiology Nuclear Medicine and imaging Sample preparation Phosphorescence Spectroscopy |
| Zdroj: | Journal of Radioanalytical and Nuclear Chemistry. 234:257-260 |
| ISSN: | 1588-2780 0236-5731 |
| DOI: | 10.1007/bf02389781 |
| Popis: | Laser-induced kinetic phosphorimetry is an accurate, sensitive and rapid alternative to radiometric determination of natural and depleted uranium in aqueous solutions. This method offers detection limits below 10 ng/l U (2.5·10−4 Bq/l natural U) and a broad analytical range to 5 mg/l U (130 Bq/l natural U). For many samples, dilution is the only sample preparation required. However, because this technique infers uranyl concentrations from time-resolved phosphorescence intensities, results are dependent upon sample matrix constituents that affect the phosphorescence of the uranyl cation. This study examines the influence of cations, anions and ligands common to natural water, process and bioassay samples on the quenching of uranyl phosphorescence and the consequences for lower limits of detection and accuracy of measurements. |
| Databáze: | OpenAIRE |
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