Preparation of 1-(2-pyridylazo)-2-naphthol functionalized benzophenone/naphthalene and their uses in solid phase extractive preconcentration/separation of uranium(VI)
-
C. R. Preetha
Summary
The preparation of solid reagent 1-(2-pyridylazo)-2-naphthol functionalized benzophenone/naphthalene for preconcentration/separation of uranium (VI) is described. These reagents enriches uranium(VI) quantitatively from dilute aqueous solutions in the pH range 10.5-11.0. The solid mixture consisting of the enriched metal ion along with solid phase extractant were dissolved in 2ml of acetone and uranium(VI) content was established spectrophotometrically by using Arsenazo III procedure. Calibration graphs were rectilinear over the uranium(VI) concentration in the range 0.002-0.1μg cm-3. Five replicate determinations of 40μg of uranium present in 1dm3 of sample solution gave a mean absorbance of 0.185 with a relative standard deviation of 1.4. The detection limit (corresponding to 3 times the standard deviation of the blank) and the enrichment factor were found to be 2μg dm-3 and 500 respectively. Further the possible separation of uranium(VI) from several bivalent, trivalent and tetravalent elements was also established. In addition to validating the developed method by successfully analysing marine sediment reference material (MESS-3), uranium content was established in soil, river and marine sediment samples by the developed method and compared with standard inductively coupled plasma mass spectrometry (ICP-MS) values.
© 2003 Oldenbourg Wissenschaftsverlag GmbH
Articles in the same Issue
- Preparation of 1-(2-pyridylazo)-2-naphthol functionalized benzophenone/naphthalene and their uses in solid phase extractive preconcentration/separation of uranium(VI)
- Solubility of crystalline thorium dioxide
- Tc(IV) chemistry in mixed chloride/sulphate acidic media. Formation of polyoxopolymetallic species
- The substitution reactions of [Tc(tu)6]3+ with CyDTA and citrate
- Investigation of chemical equilibrium kinetics by the electromigration method
- Equilibrium constants in aqueous lanthanide and actinide chemistry from time-resolved fluorescence spectroscopy: The role of ground and excited state reactions
- Destruction of 1,1-dichloroethylene/air mixture under gamma-ray irradiation
- Additivity rule and its application to the sorption of radionuclides on soils
- Globule formation of a clay mineral and a rapid method for the treatment of liquid radioactive waste
Articles in the same Issue
- Preparation of 1-(2-pyridylazo)-2-naphthol functionalized benzophenone/naphthalene and their uses in solid phase extractive preconcentration/separation of uranium(VI)
- Solubility of crystalline thorium dioxide
- Tc(IV) chemistry in mixed chloride/sulphate acidic media. Formation of polyoxopolymetallic species
- The substitution reactions of [Tc(tu)6]3+ with CyDTA and citrate
- Investigation of chemical equilibrium kinetics by the electromigration method
- Equilibrium constants in aqueous lanthanide and actinide chemistry from time-resolved fluorescence spectroscopy: The role of ground and excited state reactions
- Destruction of 1,1-dichloroethylene/air mixture under gamma-ray irradiation
- Additivity rule and its application to the sorption of radionuclides on soils
- Globule formation of a clay mineral and a rapid method for the treatment of liquid radioactive waste
