title: The uranium-Xylidyl Blue I complex and its application in linear sweep polarography.
abstract: The linear sweep polarographic wave of the uranium-Xylidyl Blue I complex in ethylenediamine-1,10-phenanthroline-hydrochloric acid medium has been studied. The complex, corresponding to UO(2)(XBI)(2-)(2) with log beta' = 9.09 (by polarography), 8.81 (by spectrophotometry), is strongly adsorbed on the surface of the mercury electrode. The polarographic wave is attributed to the reduction of Xylidyl Blue I in the complex. The method is very sensitive with a detection limit of 3 x 10(-8)M. The wave height is proportional to the concentration of uranium over the range 8 x 10(-8)-7 x 10(-6)M. Solvent extraction is used to separate possible interferences. The recommended procedure has been applied to the determination of trace amounts of uranium in ores.
authors.affiliation: Department of Chemistry, University of Wuhan, Wuhan, People's Republic of China.
authors.forename: Z
authors.initials: Z
authors.lastname: Zhao
authors.forename: X
authors.initials: X
authors.lastname: Cai
authors.forename: P
authors.initials: P
authors.lastname: Li