Abstract
A color reaction for panaxadiol, an artifact sapogenin produced by acid hydrolysis
from saponin of Ginseng root (root of Panax ginseng C. A. Meyer), and for Ginseng saponin mixture containing glycosides of protopanaxadiol, a genuine
sapogenin, is described. A red-purple color product of panaxadiol or Ginseng saponin
was formed by beat treatment with vanillin and sulfuric acid. The red-purple color
was stable for two hours in an ice-cold water bath and had a visible absorption maximum
at 544 nm. The relationship between absorbance at 544 nm and quantity of both panaxadiol
and Ginseng saponin preparation followed Beer's law for 20 μg to 100 μg of panaxadiol
and 50 μg to 250 μg of Ginseng saponin.
