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Direct electrodeposition of the DNA-Ni2+ complex onto a glassy carbon electrode for sensing methanol in alkaline medium

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Abstract

The nickel(II) complex of a deoxyribonucleic acid (DNA-Ni2+) was directly electrodeposited on the surface of a glassy carbon electrode (GCE) to give a DNA-Ni/GCE electrode. It was investigated in terms of its capability of electro-oxidizing methanol in alkaline medium. It exhibits stable redox behavior of the Ni2+/Ni3+ couple by cyclic voltammetry. The DNA-Ni2+ membrane showed excellent electrocatalytic suitability for the electro-oxidation of methanol, is stable and responds reproducibly. The linear range for the detection of methanol in alkaline medium is from 8.0 µM to 2.4 mM, and the limit of detection is 2.0 µM (at a signal-to-noise ratio of 3).

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Acknowledgements

This work was supported by Specialized Research Fund for the Doctoral Program of Higher Education (No.20060532006) and National Outstanding Youth Foundation of China (No.50725825).

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Correspondence to Wanzhi Wei or Shenglian Luo.

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Liu, Y., Wei, W., Liu, X. et al. Direct electrodeposition of the DNA-Ni2+ complex onto a glassy carbon electrode for sensing methanol in alkaline medium. Microchim Acta 168, 135–140 (2010). https://doi.org/10.1007/s00604-009-0277-5

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  • DOI: https://doi.org/10.1007/s00604-009-0277-5

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