Abstract
Ethyl carbamate (EC), a multi-site genotoxic carcinogen, exists in fermented food and beverages. However, the existing analytical methods need precise instrument, complex sample pretreatment, time-consuming, and high cost. Therefore, a disposable electrochemical biomimetic sensor was developed for fast and selective detection of EC based on reduced graphene oxide/screen-printed carbon composite electrode (rGO/SPCE). Firstly, the SPCE is modified with rGO by electrodeposition process that increased current signal and decreased the impedance of contact interface. Secondly, the OAP/rGO/SPCE biomimetic sensor was synthesized through electropolymerization by cyclic voltammograms in mixed solution of template of EC and monomer of O-aminophenol (OAP). The sensor specifically bound to EC quickly without sample pretreatment. A linear range was from 100 to 1300 nM, and a detection limit of 37 nM was achieved. The detection time is less than 5 min. The sensor possesses advantages include good chemical and mechanical stability, simplicity, low cost of preparation, and sensitive and label-free determination.
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This study was funded by the Tianjin Municipal Science and Technology Commission of China (no. 16YFXTSY00210), the National Natural Science Foundation of China (NSFC Grant no. 21503146), and the Tianjin Front Tec. LTD.
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Xiaoyu Zhao declares that he has no conflict of interest. Juanjuan Zuo declares that she has no conflict of interest. Shue Qiu declares that she has no conflict of interest. Wenshuai Hu declares that he has no conflict of interest. Yanfei Wang declares that he has no conflict of interest. Juankun Zhang declares that she has no conflict of interest.
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Zhao, X., Zuo, J., Qiu, S. et al. Reduced Graphene Oxide-Modified Screen-Printed Carbon (rGO-SPCE)-Based Disposable Electrochemical Sensor for Sensitive and Selective Determination of Ethyl Carbamate. Food Anal. Methods 10, 3329–3337 (2017). https://doi.org/10.1007/s12161-017-0886-2
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DOI: https://doi.org/10.1007/s12161-017-0886-2