In our laboratory at Bogazici University Advanced Technologies R&D Center, Thermo Scientific K-Alpha X-ray Photoelectron Spectrometer is used. Ferrous (Fe2+) and ferric (Fe3+) compounds were investigated by XPS to determine the usefulness of calculated multiplet peaks to t high-resolution iron 2p 3/2 spectra from high-spin compounds. Study of materials used for medical purpose.Microanalysis of the surfaces of metals and alloys.XPS is used widely in all branches of pure and applied sciences- as well as for troubleshooting and quality assurance purposes- but some main headings are given here. O How uniform is the chemical composition of the film? If material is present as a thin film at the surface,.What is the spatial distribution of the materials in three dimensions?.How much of each chemical state of each element is present?.What chemical states of these elements are present?.fully packed and performs just as well as the dell XPS for nearly 440 bux. Which elements are present at the surface? The 120 Hz screen still calls for a faster-response competitive, fitting in.Using XPS, some important questions can be answered. It is used to examine core-levels and subsequently to study the composition and electrostatic states of the surface region of a sample by energy-disperse analysis of the emitted core photoelectrons. Figure 7: The screen displayed during peak tting Non-Linear Least Squares Fitting (NLLSF) When the data contain sets of spectra (depth proles, linescans, angle resolved XPS etc.) it is often appropriate to use the combination of Target Factor Analysis (TFA) and Least Squares Fitting. X-ray photoelectron spectroscopy (XPS) is a quantitative analysis technique of the surface composition, which is capable of providing atomic and molecular information regarding the surface of the material.