I am trying to synthesize silver nanoparticles from a plant extract. But lower concentration of AgNO3 solution is not enough to obtain my desire UV spectrum for the characterization. So I want to increase the concentration of AgNO3 solution (5 mM). Generally 1 mM of AGNO3 solution has been recommended for in vivo test. May I try 5 mM of AGNO3 solution for my in vivo experiment?