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. 2017 Aug 9;17(8):1832. doi: 10.3390/s17081832

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© 2017 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) Comparison of the influence of the heavy metals detection with the CPE modified with purchased Cr₂O₃ compared to CPE modified with thermally produced Cr₂O₃. (B) The effect of Cr₂O₃ addition on detection sensitivity for selected metals.