log (Mn 2 *\ Zn 2 
Figure 4-8. Variations in metal activities (M) of manganese, 
zinc and iron with total copper concentration. 
Note: A) Aquil medium, 10' 5 - 3 M EDTA; B) Aquil with 10' 6 - 3 M EDTA 
10* 3 M Tris. 
54 
-log 
