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. 2021 Dec 15;11:24040. doi: 10.1038/s41598-021-01328-w

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© The Author(s) 2021

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(a) Differential pulse voltammograms for different concentrations of DA (a-r) at E-GO modified CPE 0.2 M phosphate buffer solution. (b) Graph of anodic peak current vs. concentration of DA.