At basic pH range there is a possibility of Ag+ precipitating as
AgOH also. On the basis of the results, it could be concluded that the
optimum condition for the preparation of AgNPs using T. chebula
can be taken as the neutral pH and hence the UV–visible spectroscopic
studies were carried out at various time intervals at
this pH
of AgNPs increased with increase of reaction time, indicating
more reduction of Ag+ with respect to time. The synthesized
AgNPs are stable for 10 days at 5 ◦C evident from, the max
value