![]() ![]() Synthetic spectra approximating the carbon 1s peaks for poly(methyl methacrylate), poly(vinyl acetate), poly(vinyl chloride) and poly(isobutylene) allow an analysis of accuracy of the fits in these tests. In addition, each data system had programming faults, some of which were later rectified. The results show that all the data systems studied accept VAMAS format files but not all would accept both of the options of direction of scan. The synthetic spectra allow tests for: (1) acceptance of VAMAS formats with kinetic energy or binding energy scales that may have positive or negative abscissa increments (2) Gaussian–Lorentzian sum or product function peaks (3) effectiveness of Shirley background subtraction (4) effectiveness of Tougaard background subtraction (5) peak synthesis with partly resolved peaks with no background and (6) peak synthesis with a Shirley background. The development of a range of VAMAS format data files containing synthetic test spectra and their use in evaluating the peak fitting routines of three commercial XPS data analysis systems A, B and C, is reported. ![]()
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