Abstract
Cannabis samples, more than 10 pieces each from nine administrative districts in Japan, were collected with soil for cultivation. The leaves of cannabis were picked and prepared in the usual way for irradiation and analyzed by the instrumental neutron activation method at Research Reactor Institute of Kyoto University. Concentration was determined for the following 35 elements : as Al, As, Au, Ba, Br, Ca, Ce, Cl, Co, Cr, Cs, Cu, Dy, Eu, Fe, Gd, Hg, I, In, K, La, Lu, Mg, Mn, Na, Rb, Sb, Sc, Sm, Sr, Tb, Th, V, Yb, Zn. From this result, comparison of cannabis from various geographical origins in Japan from only the difference in element concentration and ratio of these elements was discussed qualitatively, and also the correlation of element concentration between cannabis leaves and the soil in which the plant is cultivated.
