Reversed-Phase Column Extractive Separation of Gd(III) with Poly[dibenzo-18-crown-6]

Table 1

Sorption of gadolinium(III) as a function of picric acid concentration (Gd(III): 100 μgmL⁻¹, eluent: 4.0 M HCl).

Picric acid concentration; (Mole L^−1)	Sorption of gadolinium(III); (%)
1× 10^−2	100
1× 10^−3	100
1 × 10^−4	100
1×10^−5	97.4
1× 10^−6	95.4
1 × 10^−7	90.2