标题：A sensitive and selective procedure for the voltammetric determination of brilliant indigo and acid yellow 23 at surfactant modified graphene paste electrode
期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2019
卷号：10
期号：6
页码：1-10
出版社：University of Mohammed Premier Oujda
摘要：The voltammetric response of brilliant indigo and acid yellow 23 on the surface of
graphene paste electrode modified with nonionic surfactant was studied in the buffer
media at different pH by cyclic voltammetry and differential pulse voltammetry Vs.
saturated calomel electrode. Cyclic voltammograms were recorded in the potential range
from 0 V to 0.8 V for brilliant indigo, and 0.60 to 1.2 V for acid yellow 23 shows
reversible and irreversible response respectively. The developed electrochemical sensor
shows good electrocatalytic activity to the oxidation of brilliant indigo and acid yellow
23 by giving elevated peak current than those obtained for the bare electrode. At the
optimized conditions, the anodic peak current of brilliant indigo and acid yellow 23
proportional to the concentration ranges from 3.5×10-6
- 1.5×10-5 M and 1×10-5
- 6×10-
5 M with the limit of detection of 0.24 µM and 0.25 µM. The proposed method offers
rapid, simple, selective, and cost-effective analysis. Also, this developed electrode
exhibited good selectivity, stability, repeatability, and has been successfully used to
determine the real sample with a satisfactory result.
