Interaction of uranium(VI) with bioligands present in human biological fluids: the case study of urea and uric acid
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Alfatih A. A. Osman
Abstract
The complexation of uranium(VI) with bioligands found in human biological fluids, viz, urea and uric acid in aqueous solutions, has been investigated using time-resolved laser-induced fluorescence spectroscopy (TRLFS) at room temperature, I = 0.1 M (NaClO4) and pH (3 for uric acid; 4 for urea). In both complex systems a static quench effect with increasing ligand concentration and no peaks shift upon complexation were observed. With uranium(VI) both ligands formed a fairly weak 1:1 complex with average stability constants of log β110 = 4.67 ± 0.29 for uric acid and log β110 = 3.79 ± 0.15 and 2.12 ± 0.18 for relatively low and relatively high urea concentrations, respectively. Application of the newly generated data on the U(VI) speciation modelling in biofluids, e.g., human urine was also discussed.
© by Oldenbourg Wissenschaftsverlag, München, Germany
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Articles in the same Issue
- Thermodynamics of Np(IV) complexes with gluconic acid under alkaline conditions: sorption studies
- Interaction of uranium(VI) with bioligands present in human biological fluids: the case study of urea and uric acid
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- Stability studies of N,N,N´,N´-tetra-(2-ethylhexyl) dithiodiglycolamide (DTDGA)
- The effect of fluoride and silicate ions on the coprecipitation of gadolinium with calcium in phosphoric and sulpho-phosphoric media
- An electrochemical technique to prepare 55Fe source for the calibration of the X-ray detectors
- A novel and facile approach for the preparation of 133Ba source core, encapsulation and quality evaluation
