Development of a Reliable Analytical Method for Liquid Anion-Exchange Extraction and Separation of Neodymium(III)

Table 5

Effect of various diverse ions. Nd(III) = 60 μg pH = 6.00, sodium succinate = 0.06 M, Aq: Org = 25 : 10, N-n-octylaniline = 0.1 M in xylene (10 mL), equilibrium time = 5 min, and strippant = 0.1 M HClO₄ (2 × 5 mL).

Ratio of added ions Nd(III): Ions	Amount tolerated (mg)	Foreign ion
1 : 833	50	Bromide, oxalate, citrate
1 : 417	25	Thiosulphate, acetate, thiourea, tartrate, Ca(II)
1 : 250	15	Nitrate, iodide
1 : 167	10	Malonate, ascorbate, fluoride, Sr(II), Mg(II)^b, Cr(VI), Sm(III)
1 : 117	7	Phosphate, nitrite, W(VI), Cd(II), V(V)^a, Pd(II)
1 : 83	5	Ti(IV), Y(III)^c, Nb(V), Zr(IV)^a
1 : 50	3	Gd(III)
1 : 33	2	Ba(II), Zn(II), Co(II)
1 : 16	1	Mo(II), Mn(II)
1 : 8	0.5	Fe(II), Ta(V), Ce(IV), La(III)
1 : 5	0.3	Ni(II), U(VI)

^aMasked by 3 mg F⁻, ^bmasked by 5 mg oxalate, ^cmasked by 50 mg S₂O₃₋₋.