Fluorimetric determination of traces of uranium(VI) in brines and iron(III) oxides using separation on an activated silica gel column
✍ Scribed by J. de Pablo; L. Duro; J. Giménez; J. Havel; M.E. Torrero; I. Casas
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 403 KB
- Volume
- 264
- Category
- Article
- ISSN
- 0003-2670
No coin nor oath required. For personal study only.
✦ Synopsis
A method for the determmatlon of trace uranium levels in brines and waters with a high content of iron based on the separation of uranium from a mixture of masking agents by sorption on an activated s~hca gel column was developed m connectlon with the Scmtrex UA-3 uramum analyser The detectlon limit of uranyl ions was 14 ng This value can be achieved even with solutions contammg 56 mg of iron, 480 mg of magnesium and/or 1000 mg of chloride The relative standard deviation of the method IS 5% An analysis requires less than 20 mm Keywords Fluonmetry, Brines, Uranium, Waters The determination of low uranium levels m natural and waste waters 1s very important m prospectmg work with respect to environmental protection Fluornnetrlc methods are the most sensitive and advantageous for this purpose Uramum fluorescence 1s measured m solution, the fluorescence yield bemg enhanced by addmg phosphoric or hydrofluorlc acid [l] Both acids, and also phosphates or caeslum fluoride, act by replacing quenchmg water molecules m the coordmatlon sphere As many compounds quench uramum fluorescence, various separation techmques have been proposed, e g , the use of ion exchangers [2], but