This dataset contains all elemental analysis raw data collected from digested samples for the publication Gerken et al., Anal.Methods, 2025, 17, 5334 (DOI: https://doi.org/10.1039/D5AY00731C) that was used to create the figures. The files are referenced as in the publication. The information provided specifically refers to powder sample weights, sample volumes and dilution factors, measured values, calculated expected values for recovery calculation, calculated recoveries and error calculations. For Figure 2 and 3, it is important to note that the particles were always dosed from a 1 mg/ml dispersion in 10 uL aliquots, so that the dosed oxide mass equaled 10 ug.