Solid-Phase Extraction of Trace Amounts of Uranium(VI) in Environmental Water Samples Using an Extractant-Impregnated Resin Followed by Detection with UV-Vis Spectrophotometry

Table 6

Optimized experimental parameters for separation and pre-concentration of U(VI) ions by CAB-impregnated XAD-2010.

Experimental parameter	Optimum magnitude
Batch parameters
pH	4.2–4.7
Ionic strength	0.01–0.30 mol⋅L^−1
Shaking speed	180 rpm
Contact time	25 min
𝑡1/2	6 min
Capacity	0.632 mmol⋅g^−1
Concentration of eluent (HCl)	0.50 M
Volume of eluent	5 mL
Dynamic parameters
Sample flow rate	11 mL⋅min^−1
Eluent flow rate	0.5 mL⋅min^−1
Sample volume	1600 mL
LOD	5.0×10^−10 mol⋅L^−1