The research provides a new and sustainable methodology for the synthesis of silver
nanoparticles, using Eucalyptus globulus extract, this due to the fact that it presents metabolites
capable of acting as a reducing potential of our silver nitrate precursor, and thus obtaining
nanostructured material. This is also associated with the reuse of this type of organic material,
which currently abounds as waste in the Peruvian highlands. In the specific case of this
research, the effect on the stability over time of the biosynthesized silver nanoparticles was
evaluated by varying the pH, with values of 4.82, 8.05 and 10.15. It was observed that as the
pH increases the production of nanoparticles is higher, having a saturation threshold close to
pH 8. It was also found that for alkaline pH close to 10 a more complete reaction of the
reducing agent occurs, but with a high dispersion
