Fitting O Is spectra

The O 1.S region of the photoelectron spectrum from organic materials is generally rather broad, but can be re.solved into three principal features as seen in Figs. 3 and 8. The features corre.spond to -C=0 at around 531.8 eV, to 

Valence-band spectra in XPS can be especially valuable in the study of fibers and composites because the analysis of such spectra may be able to assist in the interpretation of ambiguous spectral features in the core regions. The effects of achromatic x-radiation are also much less obvious in valcnce-band spectra for the reasons discussed in Section 5.4. With the help of the valence-band spectrum it is possible to distinguish between unfunctionalized hydrocarbons (47), while useful information about polymers can also be extracted. l). When comparing valence-band data with calculation, background and X-ray satellite removal from the experimental data is usually helpful, and can be performed effectively by data processing methods 129-31.  

---