This work represented a contribution to draw attention towards the amount of metals in Basra and Kirkuk crude oil blends. These metals may effect the processing refineries of crud oils. In chapter one of this thesis, an introduction was given on the crude oil and it's origin including both inorganic and organic theories; also the composition and types of crude oil, the importance and the problems associated with the presence of the metals. Finally, the methods used for the determination of metals were given. The second chapter was dealing with experimental part, which included instruments and four different methods of sample preparation before analysis.The results and discussion was presented in chapter three. The results included the determinate concentrations of Cu, Zn, Fe, Pb, V, and Ni elements.These elements were found to be relatively large concentrations in vanadium with an average of (42.921, 29.310) ppm in Basra and Kirkuk crude oil samples respectively using dry ashing with HNO3. While the concentrations of elements Fe, Ni, Cu, and Zn were found to be relatively smallest (10.646, 9.441)ppm, (24.514, 10.646)ppm, (0.74, 0.621)ppm, (1.820,0.638)ppm respectively in Basra and Kirkuk crude oil samples too ; The lead concentration was much lower than other elements (0.469 and 0.571)ppm in Basra and Kirkuk crude oil samples Wet digestion with HNO3 gave (10.542 and 9.164), (15.594 and 24.736), (0.624 and 0.639), (1.808 and 0.625) ppm for Fe, Ni, Cu, Zn, respectively, in Basra and Kirkuk crude oil blends. The concentrations of these metals differ, some times, for certain metals in both types of the crude oil samples.
