الفهرس 
Aim of the workOnly 14 pages are availabe for public view
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Abstract
The thesis comprises three main chapters the first includes a brief collection of the literature interested in the precious elements and pollutant species concerning the methods of complexation, separation and determination. Of these, the flotation, spectrophotometric, atomic absorption and hydride generation techniques were monitored in details. Also, the literature survey had covered the complexes of pyrimidine derivatives and their applications. ?The second chapter, illustrated the experimental part of the work, including list of the reagents, stock solutions and the instrumental techniques used. These equipment are flotation cells, pHmeter, spectral instruments (U.V. Visible, MS, 1HNMR and IR), atomic absorption (flame and hydride generation), magnetic susceptibility balance, conductivity bridge, thermal analyzer, cyclic voltammetry and potentiograph. All the optimum recommended conditions for separation, spectrophotometric, flame atomic absorption and hydride generation atomic absorption are tabulated in such chapter. Also, the relations of calculating different parameters needed in this work are involved. Procedures for separationflotation and simultaneous separation of the precious elements (Ag, Pd, Au, Pt) followed by spectrophotometric determination of Pd(II) and atomic absorption determination of Ag, Au and Pt are mentioned in some details. Also a proposed procedure for the recovery of the precious elements in their native elemental pure state is elaborated. The chapter is finished by a description for the preparation of solid complexes. ?The third chapter which includes the results and discussion is divided into three main parts.