Surface chemical analysis. Auger electron spectroscopy & X-ray photoelectron spectroscopy. Guide to the use of experimentally determined relative sensitivity factors for the quantitative analysis of homogeneous materials Surface chemistry, Chemical analysis & testing, Spectroscopy, Auger electron spectroscopy, Photoelectron spectroscopy, X-ray photoelectron spectroscopy, Electron emission, Quantitative analysis, Chemical composition, Sensitivity, Homogeneity, Experimental data