Myanmar Herbal Pharmacopoeia Volume II
17
Table 1. Rf values of components in Ethyl acetate extract of the dried barks of Alstonia scholaris (L.) R. Br. Rf 0.95 0.90 0.81 0.72 0.68 0.61 0.58 0.55 0.40 0.35 0.30 0.28 0.24 0.18 0.10 0.07 • • • • • • • •
Visual
UV 254 nm
UV 365nm
Orange Brown Brown
Blue
Spray Deep blue Deep blue Pale violet
Blue Dark brown
Orange Deep blue Blue fluorescence
Faint black
Pale brown
Red
Purple Violet Blue
Faint orange Red Pale brown
Pale pink Blue Brown
Faint orange
Loss on drying at 105 °C Foreign matter Total ash Acid-insoluble ash Water soluble ash Ethanol soluble extract Water soluble extract Important formulation
Pale brown
Blue
: Not more than 8.57 % : Not more than 1.0 % : Not more than 5.15 % : Not more than 0.25 % : Not less than 3.60 % : Not less than 10.96 % : Not less than 15.60 % : Traditional Medicine Formulations (TMFs) - Nil • Traditional therapeutic uses : Arthritis, Diabetes Mellitus • Research reports : Antibacterial (dysentery and diarrhoea)14, Antihyperglycemic activity15, Antimicrobial activity16
