Spectrophotometric, potentiometric and polarographic studies were carried out in the system uranyl-gallic acid in aqueous solution of different pH values. Composition and stability of the complex formed are determined by spectrophotometric and potentiometric method. The polarographic behaviour of the di fferent complexes was studi ed and the effect of gall i c aci d on the reduction of U(VI) was discussed.


Y M ISSA ,G A EL INANY ,F ZAIDAN ,B EL SHETARY ,