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. 2014 Feb 11;7(2):1069–1083. doi: 10.3390/ma7021069

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© 2014 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 license (http://creativecommons.org/licenses/by/3.0/).

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Figure 8. — Typical current-time response curve for successive addition of 0.1 mM H₂O₂ obtained by DNA/chitosan/GCE (a), DNA/chitosan/HRP/GCE (b) and DNA/chitosan/Fe₃O₄/HRP/GCE (c) in 0.1M phosphate buffer (pH 7.0) at applied potential of −0.25 V. Inset: the plots of amperometric responses (ΔI) vs. H₂O₂ concentration.