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Highly sensitive electrochemical detection of adenine on a graphene-modified carbon ionic liquid electrode

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Abstract

A new electrochemical method for the sensitive detection of adenine was established on a chitosan (CTS)- and graphene (GR)-modified carbon ionic liquid electrode (CILE). CILE was prepared by mixing 1-butylpyridinium hexafluorophosphate (BPPF6) and paraffin with graphite powder. Due to the synergistic effects of GR, CILE, and the interaction of GR with IL on the electrode surface, the electrochemical performance of CTS/GR/CILE were greatly enhanced. Electrochemical behaviors of adenine on the modified electrode was investigated with a single well-defined oxidation peak appeared. The electrochemical reaction of adenine was an adsorption-controlled irreversible process, and the electrochemical parameters were further calculated. Under the optimal conditions, the oxidation peak current was proportional to adenine concentration in the range from 1.0 nmol L−1 to 70.0 μmol L−1 with a detection limit of 0.286 nmol L−1 (3σ) by differential pulse voltammetry. The established method showed the advantages such as good selectivity, stability, and repeatability.

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Acknowledgments

We acknowledge the financial support provided by the National Natural Science Foundation of China (21075071) and the Foundation of Hainan Normal University

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, 571158, People’s Republic of China

    Wei Sun

  2. College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People’s Republic of China

    Wei Sun, Jun Liu, Xiaomei Ju, Le Zhang & Xiaowei Qi

  3. College of Chemistry and Pharmacy, Qingdao Agriculture University, Qingdao, 266109, People’s Republic of China

    Ni Hui

Authors
  1. Wei Sun
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  2. Jun Liu
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  3. Xiaomei Ju
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  4. Le Zhang
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  6. Ni Hui
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Correspondence to Wei Sun.

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Sun, W., Liu, J., Ju, X. et al. Highly sensitive electrochemical detection of adenine on a graphene-modified carbon ionic liquid electrode. Ionics 19, 657–663 (2013). https://doi.org/10.1007/s11581-012-0789-6

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  • DOI: https://doi.org/10.1007/s11581-012-0789-6

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