Fig. 4 | Nature Communications

Fig. 4

From: Distinguishing the sources of silica nanoparticles by dual isotopic fingerprinting and machine learning

Fig. 4

Si and O isotopic fingerprints of engineered SiO2 NPs synthesized by different methods and from different manufacturers. a, b Si (a) and O (b) isotopic compositions of precipitated SiO2 NPs (EP) grouped according to manufacturers. c, d Si (c) and O (d) isotopic compositions of sol–gel and fumed SiO2 NPs (ES and EF) grouped according to manufacturers. e Si-O 2D isotopic fingerprints of EP. f Si-O 2D isotopic fingerprints of ES and EF. The error bars in e and f represent 2s.d. in parallel measurements (n = 2–5)

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