Lien Nguyen Thi, Quoc Hung Le, Hoang Nguyen Tien, Thu Vu Thi, Ngoc Nga Dau Thi, Hai Yen Pham Thi, Phong Pham Hong, Thu Ha Vu Thi
Department of Chemistry, Hanoi University of Science, 19 Le Thanh Tong, Hanoi, Vietnam.
Institute of Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam.
J Anal Methods Chem. 2020 Dec 29;2020:6693595. doi: 10.1155/2020/6693595. eCollection 2020.
In the present work, we reported the simple way to fabricate an electrochemical sensing platform to detect Bisphenol A (BPA) using galvanostatic deposition of Au on a glassy carbon electrode covered by cetyltrimethylammonium bromide (CTAB). This material (CTAB) enhances the sensitivity of electrochemical sensors with respect to the detection of BPA. The electrochemical response of the modified GCE to BPA was investigated by cyclic voltammetry and differential pulse voltammetry. The results displayed a low detection limit (22 nm) and a linear range from 0.025 to 10 m along side with high reproducibility (RSD = 4.9% for seven independent sensors). Importantly, the prepared sensors were selective enough against interferences with other pollutants in the same electrochemical window. Notably, the presented sensors have already proven their ability in detecting BPA in real plastic water drinking bottle samples with high accuracy (recovery range = 96.60%-102.82%) and it is in good agreement with fluorescence measurements.
在本工作中，我们报道了一种简单的方法来构建一个电化学传感平台，用于检测双酚A（BPA），该方法是在覆盖有十六烷基三甲基溴化铵（CTAB）的玻碳电极上通过恒电流沉积金来实现的。这种材料（CTAB）提高了电化学传感器检测BPA的灵敏度。通过循环伏安法和差分脉冲伏安法研究了修饰的玻碳电极对BPA的电化学响应。结果显示检测限低（22 nm），线性范围为0.025至10 μM，同时具有高重现性（七个独立传感器的相对标准偏差RSD = 4.9%）。重要的是，所制备的传感器在同一电化学窗口中对其他污染物的干扰具有足够的选择性。值得注意的是，所展示的传感器已经证明了它们能够高精度地检测实际塑料饮用水瓶样品中的BPA（回收率范围为96.60%-102.82%），并且与荧光测量结果高度一致。
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