Facile and Simultaneous Stripping Determination of Zinc,Cadmium and Lead on Disposable Multiwalled Carbon Nanotubes Modified Screen‐Printed Electrode |
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| Authors: | Liang Fu Xueling Li Jianshuan Yu Jianshan Ye |
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| Institution: | 1. College of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, P.?R. China tel: 86‐20‐8711?3241, fax: 86‐20‐8711?2901;2. Guangzhou Ingsens Sensor Technology Co. Ltd, Kaiyuan Road, Guangzhou 510530, P.?R. China;3. Xiamen Environmemtal Monitoring Centre, Xiamen 361004, P.?R. China |
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| Abstract: | Screen‐printed electrodes (SPEs) are cheap and disposable. But their application for heavy metal detection is limited due to the low sensitivity and poor selectivity. Here we report the ultrasensitive and simultaneous determination of Zn2+, Cd2+ and Pb2+ on a multiwalled carbon nanotubes and Nafion composite modified SPE with in situ plated bismuth film (MWCNTs/NA/Bi/SPE). The linear curves range from 0.5–100 µg L?1 for Zn2+ and 0.5–80 µg L?1 for Cd2+. Uniquely, the linear curve for Pb2+ ranges from 0.05–100 µg L?1 with a detection limit of 0.01 µg L?1. The practical application was verified in real samples with satisfactory results. |
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| Keywords: | Heavy metal detection Multiwalled carbon nanotubes Screen‐printed electrodes Bismuth Stripping voltammetry |
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