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

Table 1

Extraction behaviour of platinum(IV) as a function of diluents. (Pt(IV) = 150 μg, Aq : Org = 2.5 : 1, pH = 0.50, ascorbic acid = 0.01 M, equilibrium time = 3 min, and strippant = water (2×10 mL)).

Solvent	Dielectric constant, (𝜀)	Percentage extraction, (%𝐸)	Distribution ratio, (𝐷)
Benzene	2.27	100	∞
Xylene	2.30	100	∞
Toluene*	2.38	100	∞
Chloroform	4.80	23.8	0.78
Methyl isobutyl ketone	13.10	60.8	3.87
n-Butanol	17.80	No extraction	—
Amyl alcohol	13.90	No extraction	—
Amyl acetate	13.90	No extraction	—
1,2-Dichloroethane	10.50	No extraction	—

∗Recommended for general extraction procedure.