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. 2022 Mar 11;94(11):4703–4711. doi: 10.1021/acs.analchem.1c04898

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© 2022 The Authors. Published by American Chemical Society

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Demonstrating MVA on datasets after performing MFP on 3D OrbiSIMS depth profiling data from injector tip 1 deposit. (a) DBE versus carbon number plots of all oxygenated ions (C_nH_nO₂^–) identified using MFP. (b) DBE versus carbon number plots of all carbonaceous ions (C_nH_<1^–) identified using MFP. (c) Loadings of oxygenated ions after performing NMF on the filtered list of oxygenated ions identified using MFP. (d) The first two loadings of carbonaceous ions identified using MFP. (e) Depth profiles of the first two endmembers of the oxygenated ions. (f) Depth profiles of the first two endmembers of the carbonaceous ions.