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Organometallic Au(III) Based Electrochemical Sensor with Wide Anodic Potential Window for Sensitive and Selective Detection of Ochratoxin A |
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| Authors: | Yuan Xiang Hao Huang Dan Wang Juan Du Dongping Wu Wanming Xiong Yanping Hong Jinyin Chen Xiaoning Liao |
| Affiliation: | 1. Collaborative Innovation Center of Postharvest Key Technology and Quality Safety of Fruits and Vegetables in Jiangxi Province, Nanchang, 330045 P. R. China Research Center of Mycotoxin, Jiangxi Agricultural University, Nanchang, 330045 P. R. China These authors contributed equally to this work;2. College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang, 330045 P. R. China;3. Research Center of Mycotoxin, Jiangxi Agricultural University, Nanchang, 330045 P. R. China;4. Collaborative Innovation Center of Postharvest Key Technology and Quality Safety of Fruits and Vegetables in Jiangxi Province, Nanchang, 330045 P. R. China |
| Abstract: | Herein, an organometallic Au(III) catalyst was easily prepared via self-assembly method using chloroauric acid (HAuCl4) and cetyltrimethylammonium bromide (CTAB). The electrode fabricated by the catalyst not only shows extended anodic potential window compared to that of Au nanoparticle-based electrode, but also possess the high electrocatalytic activity in the selective oxidation of Ochratoxin A. Under optimized conditions, the modified electrode exhibits a wide linearity range from 1.0×10−7 to 1.0×10−5 mol/L and a low detection limit of 2.9×10−8 mol/L (S/N=3). Furthermore, the electrochemical sensor possesses good recoveries between 93.5 % and 98.2 % in real sample analysis, indicating high accuracy in real sample analysis. |
| Keywords: | Anodic potential window Electrochemistry Gold Ochratoxin A |