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. 2019 Jun 6;19(11):2584. doi: 10.3390/s19112584

Figure 2.

Figure 2

(A) Typical amperometric I-t response and corresponding calibration curve (inset) during successive 1 mM injections of glucose at a (a) Pt wire electrode, (b) Pt-Ir wire electrode, and (c) Pt macroelectrode modified with GOx-doped OTMS xerogel, undoped OTMS xerogel, polyphenol (PP), polyurethane layer (50:50), and epoxy cap; (B) Typical amperometric I-t response and (C) calculated selectivity coefficients during successive injections of common interferent species (100 μM) and glucose (1 mM and/or 3 mM) at a Pt-Ir wire electrode modified with the same four layers described in (A). Notes: Soln. is 60.0 mM PBS, pH = 7.4, μ = 155 mM (wires) and 4.4 mM PBS, pH = 7.0 (macroelectrode). Note: Error bars represent standard error (n ≥ 3).