Methodological features of mass-spectrometric studies of oxidized metal surfaces

Resumo

Clustering of silver halides under the conditions of photoionization has previously been studied by laser desorption/ionization mass spectrometry. Some features of desorption/ionization of silver halides from different metal surfaces (stainless steel and different partially oxidized aluminum alloys) are discussed in this study. The data on the m/z values determination accuracy, resolving power, ionization efficiency, and distortion of isotope distribution in the studies of oxidized surfaces are statistically generalized. It is shown that the results can be used to gain insight into the chemical nature and morphology of examined surfaces and, in particular, to plot diagrams for distribution of analyzed compounds over the surfaces.