Inexpensive Bismuth-Film Electrode Supported on Pencil-Lead Graphite for Determination of Pb(II) and Cd(II) Ions by Anodic Stripping Voltammetry

Table 3

Recovery of Cd(II) and Pb(II) in battery industry wastewater sample fortified in two concentration levels: (I) 190 μg L⁻¹ and (II) 235 μg L⁻¹.

Cd(II); (μg L^−1)			Recovery; (%)		Pb(II); (μg L^−1)			Recovery; (%)
Blank	(I)	(II)	(I)	(II)	Blank	(I)	(II)	(I)	(II)
ND	205 ± 7.4	228 ± 8.5	108 ± 3.9	96.9 ± 3.6	15.1	190 ± 10.4	239 ± 12.2	100 ± 5.5	102 ± 5.2