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. 2016 Mar 8;24(2):406–416. doi: 10.1016/j.jfda.2015.11.011

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© 2016 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/).

PMC Copyright notice

Differential pulse voltammograms of DSNPs-GCE in a 0.10M phosphate buffer solution (pH 7.0) containing different concentrations of AA, NA, UA, and Trp. Numbers 1–13 correspond to 389.1–990.1μM of AA, 51.9–132.0μM of NA, 51.9–132.0μM of UA, and 129.7–330.0μM of Trp. The inset indicates the DPV of a mixed solution of 900μM AA, 130μM NA, 130μM UA, and 300μM Trp at the unmodified GCE. Insets A–D show the plots of the electrocatalytic peak current as a function of the AA, NA, UA, and Trp concentrations, respectively. AA = ascorbic acid; DPV, differential pulse voltammetry; DSNPs-GCE = delphinidin silver nanoparticles modified glassy carbon electrode; GCE = glassy carbon electrode; NA = noradrenaline; Trp = tryptophan; UA = uric acid.