XPS spectra from nucleobases, DNA, and RNA

X-ray photoelectron spectroscopy was used to analyze commercially available powders of thymine, uracil, cytosine, guanine, adenine, as well DNA isolated from salmon testes and RNA torula yeast. The were pressed onto a sample holder analyzed received the manufacturer. Survey spectra high-resolution O 1s, N C 1s all nucleobases are reported, including small Na contamination in cytosine. Spectra also included for comparison. Furthermore, presented data compared with previously published results, theoretical values, differences discussed.