New solid phase extractor based on ionic liquid functionalized silica gel surface for selective separation and determination of lanthanum

Journal of Analytical Science and Technology

Table 1 Selectivity study of 20 mg SG-N-PhenacylPyrNTf ₂ toward different metal ions

Metal ion	Concentration (mg L⁻¹)	q _e(mg g^–1)	K _d(mL g⁻¹)
Co(II)	2.00	0.54	340.33
Fe(II)	2.00	0.17	93.36
Fe(III)	2.00	1.65	2410.32
La(III)	2.00	2.50	2.50 × 10⁶
Ni(II)	2.00	0.55	354.62