Strippant
mol/L / pH
Percentage extraction,
(%E )
Ammonia
1-10
53.4
HCl
1-3
16.7
H
2
SO
4
1-3
20.7
HNO
3
1-3
31.9
HBr
1-3
12.3
Water*
-
100
NaCl
1-5%
65.2
Ammonia buffer
pH-10
No stripping
*Recommended for general extraction procedure
Pt(IV)=150 μg, Aq: Org=2.5: 1
pH=0.50, Ascorbic acid=0.01 M
Equilibrium time=3 min, n-octylaniline=0.1 M in toluene
Table 2:
Extraction behavior of platinum (IV) as a function of stripping agents.
