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. 2016 Nov 8;25(2):293–301. doi: 10.1016/j.jfda.2016.10.002

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© 2017 Taiwan Food and Drug Administration

This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Differential pulse voltammogram curves (I–E) of 1.49 μM tartrazine on (a) unmodified CPE, (b) ZnO NPs-CPE, (c) Pp-ABSA/CPE, and (d) Pp-ABSA/ZnO NPs-CPE. Scan rate =20 mV/s. CPE =carbon paste electrode; Pp-ABSA/CPE =poly (p-aminobenzenesulfonic acid)/carbon paste electrode; Pp-ABSA/ZnO NPs-CPE =poly (p-aminobenzenesulfonic acid)/zinc oxide nanoparticles carbon paste electrode; ZnO NPs-CPE =zinc oxide nanoparticles carbon paste electrode.