Abstract: The effects of some cations and anions on the intensities, the stabilizing of the arc temperature as well as the securing of a smooth burn were investegated systematically.This paper discoursed upon the effect of cations on diffusion coefficient and the influence of spectral buffer on the arc temperature.This investegation indicated that the effect on transit time and diffusion coefficient is very remarkably. It can be noticed that the transit time relates to the inoization, potential of the atoms of metals and their atomic weight.