Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 794, Issue -, Pages 64-70Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2017.03.041
Keywords
Sudan I; Graphene; beta-cyclodextrin; Platinum nanoparticles; Modified electrode; Food analysis
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Funding
- Ministry of Science and Technology (MOST), Taiwan (ROC) [MOST104-2113-M-027-008-MY2]
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In the present work, we report a sensitive and low level electrochemical detection of Sudan I in food samples using platinum nanoparticles (PtNPs) decorated graphene-beta-cyclodextrin (graphene/beta-CD) modified electrode for the first time. Cyclic voltammetry was used to evaluate the electrochemical behavior of different modified electrodes towards Sudan I. Cyclic voltammetry results reveal that graphene/beta-CD/PtNPs composite modified electrode has high electrocatalytic activity towards Sudan I than other modified electrodes. Under optimum conditions, the graphene/beta-CD/PtNPs composite modified electrode detects the Sudan I in the linear response ranging from 0.005 to 68.68 mu M with a lower limit of detection of 1.6 nM. As a proof of concept, the graphene/beta-CD/PtNPs composite modified was used for the determination of Sudan I in chili powder, chili sauce, tomato sauce and ketchup and found satisfactory recovery of Sudan I. Therefore, the fabricated sensor can be used for the detection of Sudan I in adulterated food samples. (C) 2017 Elsevier B.V. All rights reserved.
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