کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7143186 | 1462056 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
MWCNTs-PEI composites-based electrochemical sensor for sensitive detection of bisphenol A
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
Bisphenol A (BPA), an important widely used industrial material, could emulate or disrupt the endogenous estrogen. This work presents a simple and convenient electrochemical differential pulse voltammetry (DPV) method for sensitively determining BPA via the fabricated sensor basing MWCNTs-PEI nanocomposites. Scanning electron microscopy (SEM) and Zeta potential measurements have been employed to characterize the morphology and surface modification of the nanocomposites. Electrochemical behaviors of BPA on MWCNTs-PEI modified electrode were investigated. The experimental parameters, such as accumulation potential, accumulation time and pH, have been optimized. Under the optimal conditions, the constructed sensor showed a wide linear range from 10 nM to 50 μM, low detection limit of 3.3 nM BPA (S/N = 3), good stability and reproducibility, which could be attributed to that the presence of MWCNTs promotes fast electron-transfer, and polyethylenimine (PEI) provides a positively charged surface for favorably loading a large amount of BPA. Furthermore, this proposed sensor was successfully demonstrated for the detection of BPA in the real milk samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 235, 1 November 2016, Pages 408-413
Journal: Sensors and Actuators B: Chemical - Volume 235, 1 November 2016, Pages 408-413
نویسندگان
Yayun Yang, Huan Zhang, Chusen Huang, Nengqing Jia,