Abstract
The rate and the extent of extraction of magnesium from dried leaves and herbs of
13 medicinal plants have been studied. There was a fairly rapid extraction from both
the leaves and the herbs. As much as 92 % of total magnesium was extracted within
10 min from Folium Sennae and 86 % from Folium Farfarae, at 20° C. With herbs the
rate ranged from 41 to 63 % within the period indicated. The extent of extraction,
arbitrarily defined as the ratio of the quantity of magnesium extracted from 1 g of
a material during 24 hr to the total magnesium content in 1 g of the material, exceeded
70 % in 8 out of 13 materials investigated. Except for a few cases, the extraction
was practically completed within 30 and 60 min for leaves and herbs, respectively.
