Microwave-Assisted Digestion of Polyurethane Foam as an Alternative to Elution: Solid Phase Extraction of Cd(II) and Pb(II) for Their Determination in Swimming Pool Waters

Table 3

Analytical figures of merit for the determination of Cd and Pb in swimming pool waters by GF AAS after preconcentration on polyurethane foam.

Parameter	Pb(II)	Cd(II)
Concentration range	1.8–40 μg·L^−1	0.06–3 μg·L^−1
LOD	0.5 μg·L^−1	0.02 μg·L^−1
LOQ	1.8 μg·L^−1	0.06 μg·L^−1
Calibration equation	A = 0.0069 (Pb (μg L^−1)) + 0.0047	A = 0.16 (Cd (μg L^−1)) + 0.0018
r^2	0.9976	0.9996
Intermediary precision	7.3%	6.1%