Most of the synthetic peak models used a LA line shape-a numeric convolution of a Lorentzian with a Gaussian. Select peaks were modeled with the product of a Lorentzian and Gaussian (GL) to achieve a lower residual standard deviation. Quantification of atomic concentration was calculated from a spectra formed by merging high-resolution core-level peaks, and integrating peak regions then normalizing the individual core level signal area to the total peak area yielding atomic percentage.