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. 2018 Apr 29;11(5):702. doi: 10.3390/ma11050702

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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(A) DPV response of 2.0 μM Cd²⁺ and Pb²⁺ on five 10 wt % poly(BPE)/g-C₃N₄ composite-modified GCEs in 0.1 M ABS (pH = 4.5). (B) The data collected from every DPV response for a total of 10 times. RSD refers to the relative standard deviation. (C) DPV response of 2.0 μM Cd²⁺ and Pb²⁺ on the 10 wt % poly(BPE)/g-C₃N₄ composite-modified GCE in 0.1 M ABS (pH = 4.5). (D) The data collected from every DPV response for a total of 10 times, RSD refers to the relative standard deviation.