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  • Author or Editor: A. Khuder x
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Abstract  

Lacunary polyphosphotungstate salt, K10P2W17O61 (P2W17) showed a good ability to adsorb uranium from phosphoric acid solutions under certain conditions. Effects of several factors, such as Fe2+, H3PO4 and U concentrations and some cations present in the medium, on the uranium adsorption yield by P2W17 complex were studied. In addition, effect of agitating time and reaction temperature were investigated.

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Abstract  

Uranium in phosphoric acid was determined by the calibration curve method. The prepared samples, resulting from the adsorption of uranium from phosphoric acid solution on lacunary polytungstophosphate salt (K10P2W17O61) are thin and proved to be suitable for XRF analysis.

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Abstract  

XRF and TXRF were established as useful techniques for multi-element analysis of whole blood and human head hair samples. Direct-XRF with different collimation units and different X-ray excitation modes was successfully used for the determination of S, P, K, Ca, Fe, and Br elements in blood samples and K, Ca, Mn, Fe elements in human hair samples. Direct analysis by TXRF was used for the determination of Rb and Sr in digested blood and human hair samples, respectively, while, the co-precipitation method using APDC for TXRF analysis was used for the determination of Ni, Cu, Zn, and Pb elements in both matrices. As a result, the improved XRF and TXRF methods were applied for multi-element determination of elements in whole blood and human hair samples in non-occupational exposed population living in Damascus city. The mean concentrations of analyzed elements in both matrices were on the reported range values for non-occupational population in other countries.

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