Square wave anodic stripping voltammetric determination of lead(II) using a glassy carbon electrode modified with a lead ionophore and multiwalled carbon nanotubes
- Resource Type
- Original Paper
- Authors
- He, Xiuhui; Chen, Li; Xie, Xuan; Su, Zhaohong; Qin, Cong; Liu, Ying; Ma, Ming; Yao, Shouzhuo; Deng, Le; Xie, Qingji; Tian, Yun; Qin, Dilan; Luo, Yueping
- Source
- Microchimica Acta: An International Journal on Analytical Micro- and Nanochemistry. January 2012 176(1-2):81-89
- Subject
- Ionophore
Multiwalled carbon nanotubes
Bismuth film electrode
Square wave stripping voltammetry
Pb2+
- Language
- English
- ISSN
- 0026-3672
1436-5073
We report on a glassy carbon electrode (GCE) modified with a lead ionophore and multiwalled carbon nanotubes. It can be applied to square wave anodic stripping voltammetric determination of Pb(II) ion after preconcentration of Pb(II) at −1.0 V (vs. SCE) for 300 s in pH 4.5 acetate buffer containing 400 μg L−1 of Bi(III). The ionophore-MWCNTs film on the GCE possesses strong and highly selective affinity for Pb(II) as confirmed by quartz crystal microbalance experiments. Under the optimum conditions, a linear response was observed for Pb(II) ion in the range from 0.3 to 50 μg L−1. The limit of detection (at S/N = 3) is 0.1 μg L−1. The method was applied to the determination of Pb(II) in water samples with acceptable recovery.FigureA glassy carbon electrode modified with a lead ionophore and multiwalled carbon nanotubes is successfully applied to sensitive and selective square wave anodic stripping voltammetric determination of Pb(II) ion after preconcentration of Pb(II) at −1.0 V (vs. SCE) in pH 4.5 solutions containing 400 μg L−1 of Bi(III).