Journal
ANALYTICAL METHODS
Volume 6, Issue 19, Pages 7801-7808Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ay01492h
Keywords
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Funding
- National Natural Science Foundation of China [21275132]
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A sensitive voltammetric sensor, a graphene-modified glassy carbon electrode (GR/GCE), for the detection of trace amounts of curcumin is proposed. The GR/GCE was characterized by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The electrochemical behavior of curcumin at the GR/GCE was investigated by CV and liner sweep voltammetry (LSV). The reaction mechanisms of curcumin on the GR/GCE were also investigated and discussed systematically. In addition, the currents measured by LSV presented a good linear relationship with curcumin concentrations in the range of 5.0 x 10(-8) to 3.0 x 10(-6) mol L-1, with a low detection limit of 3.0 x 10(-8) mol L-1. The method was also applied successfully to detect curcumin in a Curcuma longa L. sample with high selectivity and accuracy, as well as good recovery.
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