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. 2018 May 5;8(2):23. doi: 10.3390/biom8020023

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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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Cu²⁺ concentrations in unfiltered control and reaction samples; red = control (no colominic acid), blue = reaction (with colominic acid). Entered concentration refers to the metal concentration of the prepared working solutions.