Simultaneous determination of arsenic and uranium by the diffusive gradients in thin films technique using Lewatit FO 36: Optimization of elution protocol

The sorption ability of Lewatit FO 36-DGT resin gel, which has been developed for arsenic determination, towards uranium was tested by batch experiments within this study the first time. Since uptake efficiency 99.0 ± 0.4% and maximum capacity not achieved even at U spike 1250 μg in solution, 36 seems to be a suitable binding phase DGT gels determination uranium. gel also does display any significant selectivity favour one element over another. A novel protocol simultaneous elution from therefore proposed study. efficiencies 90.3 3.9% 85.2 3.1% As U, respectively, were obtained using 5 mL 1 M NaOH 70 °C 24 h. comparison with original microwave-assisted 0.25 0.17 NaCl 130 16 min indicates, that provides good results performance and, addition, allows Moreover, elimination process fast simple analysis both elements ICP-MS, therefore, technique can become more commonplace among laboratories without need modify analytical method as