Assertion: impurity's level | /r/HasProperty | 0.09%
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Source sentences:
text: Similar levels of Si (0.09%) were detected on the surface of both GO samples with the binding energy of the Si 2p peak (102 eV) indicating the presence of an organosilicon compound rather than an inorganic Si oxide (SiO 2 ), which would be expected at 103.5 eV (Fig.