Abstract
Hydrogen peroxide (H2O2), an important representatives of reactive oxygen species, its aberrant expression is related to many diseases, including cancers. Therefore, it is very significant to design a reliable method for the real-time detection of endogenous H2O2. Herein, we describe preparing a poly (azure I)/crumpled graphene (cGN) modified electrode by an electro-polymerization method. The results showed that this electrode presented obvious electrocatalytic effect on the reduction of H2O2. Amperometric method was employed to monitor H2O2, and the amperometric response exhibited a good linear relationship with its concentration in the range of 8.0 × 10–6–1.25 × 10–3 mol/L; the detection limit reached to 6.7 × 10–7 mol/L (S/N = 3). Furthermore, this modified also displayed good selectivity, long-term stability and a high anti-interference ability. Excitingly, the established method could be successfully used to detect H2O2 in human serum samples, and measured H2O2 secreted from living MCF-7 cells. It could have potential use in cancer diagnosis.
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Acknowledgments
We gratefully appreciate financial support from the Open Research Project of State Key Laboratory of Transducer Technology of Shanghai Institute of Microsystem and Information Technology of Chinese Academy of Sciences (SKT2003); the Key Project of Anhui Province Excellent Talent Support Program (gxyqZD2019079); PhD Research Funding of Suzhou University (2019jb27, 2019jb23); the Open Research Project of Suzhou University Research Platform (2019ykf08, 2019ykf06).
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Zhang, K., Zhang, Z., Ma, S. et al. Crumpled Graphene/Poly (azure I) Modified Electrode for Non-enzymatic Detection of Hydrogen Peroxide Secreted from Tumor Cells. ANAL. SCI. 37, 1367–1372 (2021). https://doi.org/10.2116/analsci.21P003
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DOI: https://doi.org/10.2116/analsci.21P003