2.3. Powder blending
Powder mixtures of okra extracts with flurbiprofen (FBP) and
theophylline (THP) were prepared at a fixed extract to drug ratio of
25% and 50%. The samples were tumble mixed for 20 min (50 rpm)
and a random sample of 10 mg was taken from each powder
mixture to evaluate the content homogeneity. Drug content was
determined using UVeVis spectrophotometry at a maximum
wavelength (lmax) of 247 or 272 nm for FBP and THP, respectively.