測氰方法與各類氰化物的回收率

氰化物回收率（％）  測氰方法  可釋放氰化物  總氰化物

(CN)2、HCN、CN-                  100            100

Pb(CN)42-                        100            100

Zn(CN)42-                        100            100

Cd(CN)42-                        100            100

Cu(CN)32-                        100            100

Ni(CN)42-                        —             98.5

Fe(CN)64-                        —             97.9

Fe(CN)63-                        —             96.3

Au(CN)2-                         —            100

Au(CN)4-                         —            7.7

Co(CN)63-                        —            2.6

    注：— 表示未查到試驗結(jié)果，回收率接近零。