Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1172464 | Analytica Chimica Acta | 2006 | 5 Pages |
Abstract
In this work, synergistic flotation of U(VI)-alizarin complex at the presence of some diamine compounds was firstly investigated by the spectrophotometric method. The flotation process was carried out on aliquots of 100 ml of U(VI) solutions containing alizarin and the diamine at pH of 5.00 using n-heptane. The floated layer was then dissolved in acetonitrile and its absorbance was measured. Since the synergistic effect of 4,4â²-diaminophenylmethane (dapm) was much more than the others, it was used for the determination of U(VI) by this method. Beer's law was obeyed (λmax = 591 nm) in the range of 5 Ã 10â7 to 1 Ã 10â5 mol lâ1 with the apparent molar absorptivity of 1.12 Ã 106 l molâ1 cmâ1, and a correlation coefficient of 0.9991. The detection limit (n = 7) was 1 Ã 10â7 mol lâ1, and the R.S.D. (n = 7) obtained for 4 Ã 10â6 mol lâ1 of U(VI) was 2.23%. Except that only a few analogous cations, which could be masked by EDTA, no interference was observed at the presence of various conventional ions, even at high concentrations. The reliability and applicability of the method were confirmed using some geological standard reference materials and spiked synthetic water samples, respectively.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Mohammad Saeid Hosseini, Heidar Raissi, Hamid Reza Yavari,