Liquid Anion Exchange Chromatographic Extraction and Separation of Platinum(IV) with n-Octylaniline as a Metallurgical Reagent: Analysis of Real Samples

Table 2

Extraction behavior of platinum(IV) as a function of stripping agents. (Pt(IV) = 150 μg, Aq : Org = 2.5 : 1, pH = 0.50, ascorbic acid = 0.01 M, equilibrium time = 3 min, and n-octylaniline = 0.1 M in toluene).

Strippant	mol/L/pH	Percentage extraction, (%𝐸)
Ammonia	1–10	53.4
HCl	1–3	16.7
H2SO4	1–3	20.7
HNO3	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.