title: Determination of uranium, iron, copper, and nickel from ore samples by MEKC using N,N'-ethylene bis(salicylaldimine) as complexing reagent.
abstract: An analytical procedure has been developed for the separation of dioxouranium(VI), iron(III), copper(II), nickel(II), cobalt(II), cobalt(III), palladium(II), and thorium(IV) by MEKC using N,N'-ethylene bis(salicylaldimine) (H(2)SA(2)en) as a complexing reagent with total runtime <4.5 min. SDS was used as micellar medium at pH 8 with sodium tetraborate buffer (0.1 M). An uncoated fused-silica capillary with an effective length of 50 cm x 75 microm id was used with an applied voltage of 30 kV with photodiode array detection at 231 nm. Linear calibrations were obtained within 0.111-1000 microg/mL of each element with LODs within 37-325 ng/mL. The developed method was tested for analysis of uranium ore samples indicating its presence within 103-1789 microg/g with RSD within 0.79-1.87%. Likewise copper, nickel, and iron in their combined matrix were also simultaneously determined with RSD 0.4-1.6% (n = 6).
authors.affiliation: Dr. M. A. Kazi Institute of Chemistry, University of Sindh, Jamshoro, Pakistan.
authors.forename: Muhammed Aslam
authors.initials: MA
authors.lastname: Mirza
authors.forename: Muhammad Yar
authors.initials: MY
authors.lastname: Khuhawar
authors.forename: Rafee
authors.initials: R
authors.lastname: Arain
mesh_terms: D000447:Aldehydes; D002021:Buffers; D002614:Chelating Agents; D020374:Chromatography, Micellar Electrokinetic Capillary / Q000379:methods*; D003300:Copper / Q000032:analysis*; D005029:Ethylenediamines; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D007501:Iron / Q000032:analysis*; D009532:Nickel / Q000032:analysis*; D012997:Solvents; D014501:Uranium / Q000032:analysis*
chemical_list: D000447:Aldehydes; D002021:Buffers; D002614:Chelating Agents; D005029:Ethylenediamines; D007202:Indicators and Reagents; D012997:Solvents; D014501:Uranium; D003300:Copper; D009532:Nickel; D007501:Iron