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. 2015 Jan 22;15(2):2232–2243. doi: 10.3390/s150202232

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© 2015 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/4.0/).

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Figure 1. — Chronoamperogram registered using an ALP-based biosensor under the optimum conditions (applied potential, +0.20 V vs. Ag/AgCl SPE; supporting electrolyte pH 8.00 (Tris HCl buffer, 0.36 M total Cl⁻) and 2-phospho-l-ascorbic acid trisodium salt 0.32 mM, in the W(VI) concentration range from 3.0 μM to 30.0 μM. Inset figure, a calibration curve for twelve aliquot W(VI) additions under optimum conditions.