Abstract
In this study, a simple and environmentally friendly method for the determination of trace Zn(II) in honey is presented. The method was based on the preconcentration of Zn(II) on a bismuth-film-modified montmorillonite doped carbon paste electrode at −1.4 V and then the oxidation of Zn(II) by potential scan from −1.4 to 0 V using square wave stripping voltammetry. Experimental results illustrate that the sensitivity of the bismuth film electrode can be improved by a montmorillonite doped carbon paste electrode. Under optimal conditions, a linear range was observed for Zn(II) in the concentration range from 1 to 64 μg dm−3, and the detection limit of Zn(II) was 0.18 μg dm−3 with a 240-s deposition step. The proposed method was successfully applied to the determination of Zn(II) in honey samples.
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Acknowledgments
This research is supported by the National Natural Science Foundation of China (No. 61171033) and Graduate Innovation Foundation of Shanghai University (SHUCX120114).
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Meng, J., Li, F., Luo, L. et al. Determination of zinc in acacia honey by square wave stripping voltammetry with a bismuth-film-modified montmorillonite doped carbon paste electrode. Monatsh Chem 145, 161–166 (2014). https://doi.org/10.1007/s00706-013-0976-9
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DOI: https://doi.org/10.1007/s00706-013-0976-9