Research Article

Quantification of Gymnemagenin and -Sitosterol in Marketed Herbal Formulation by Validated Normal Phase HPTLC Method

Table 3

Results of recovery studies ( ).

DrugAmount takenaAmount addedaAmount recovereda  ±  S.D% Recovery % RSD

Gymnemagenin 500400
500500
500600

-Sitosterol500400
500500
500600

Concentration in ng band−1; RSD is the relative standard deviation.