抄録
Determination of arbutin in crude drugs is made by the use of thin-layer chromatography (TLC) and photometry. The aqueous solution of arbutin is colored by diazotised sulfanilic acid to orange yellow, whose absorption maximum is at 505mμ. In this condition there is a good corrleation between weight of arbutin and absorbance. The arbutin spot isolated by TLC from the extract of a crude drug is similarly colored, its absorbance is measured, and then the concentration of arbutin in the crude drug can be caliculated from the calibration curve.
