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. 2008 Sep 18;8(9):5775–5791. doi: 10.3390/s8095775

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© 2008 by the authors; licensee Molecular Diversity Preservation International, 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 7. — The profiles of inhibition of the biosensor response by several metal ions at 120 μM of AA2P substrate in 0.1 M tris-HCl buffer, pH=8.5, applied potential 0.6 V versus Ag/AgCl reference. Fe₃O₄ nanoparticles immobilized was 0.4 wt%.