From: Pharmacognostic standardisation of the leaves of Costus afer Ker Gawl. (Zingiberaceae) and Palisota hirsuta (Thunb.) K. Schum. (Commelinaceae)
Heavy metal
Copper
Iron
Zinc
Manganese
Lead
Costus afer (mg/100Â g)
0.71
43.94
5.71
14.38
0.00
Palisota hirsuta (mg/100Â g)
1.09
29.38
266.80