Translated from Google translate...

The objective of the following work has been to carry out a sampling of RAMAN vibration spectral signals that, associated with optical microscopy images coupled to the spectra, allow to determine the presence of graphene derivatives in COVID19 vaccine samples marketed under four different brands. More than 110 objects visible under the optical microscope with an appearance compatible with graphene structures have been analyzed, of which a total of 28 objects were selected for this report for their compatibility with the presence of graphene or derivatives in the samples, taking into account the correspondence between its images and spectral signals with those obtained from a standard sample and from the scientific literature. Of these 28 objects, in 8 of them the identity of the material with graphene oxide is conclusive due to the high spectral correlation with the pattern. The remaining 21 objects show a very high compatibility with graphene structures, taking into account both their spectra and their optical image together. The research remains open and is made available to the scientific community for discussion and replication and optimization.