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. 2016 Sep 29;86(3):323–335. doi: 10.1007/s10847-016-0661-9

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© The Author(s) 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 10 — Response curves for Na⁺ obtained with ISEs based on ionophore 2. a graphite screen printed electrode (s-p,n). b glassy carbon electrode (gc). Curve A indicates the response for Na⁺ without interfering ions. Curve B indicates the response for Na⁺ with interfering ions (4.2 mM K⁺, 1.1 mM Ca²⁺, 0.6 mM Mg²⁺)