“…Column chromatography (Chopra et al, 1965) and gas-liquid chromatography (Larry, 1973;Usseglio-Tomasset, 1966) have been used for the quantitative determination of /3-asarone, while thin-layer chromatog-Food and Drug Administration, 599 Delaware Ave., Buffalo, New York 14202. raphy (TLC) (Stahl, 1965) has been used for the qualitative identification of the components in calamus.…”