Sample Amount Present (ng) Amount Added (ng) Amount Recovered % Recovery Ethanolic extract 384.31 ng     1000 ng 1384.31 ng 99.86 Isolated quercetin 228.15 ng 1000 ng 1228.15 ng 99.76 Market formulation 312.24  ng 1000 ng 1312.24 ng 99.75

Table 3: Recovery study.