Electrochemical Determination of Bisphenol A at Carbon Nanotube-Doped Titania-Nafion Composite Modified Electrode

• Published in: Bulletin of the Korean Chemical Society Vol. 34; no. 4; pp. 1065 - 1069
• Main Authors: Kim, Byung Kun, Kim, Ji Yeon, Kim, Dong-Hwan, Choi, Han Nim, Lee, Won-Yong
• Format: Journal Article
• Language: English
• Published: 대한화학회 20.04.2013
• Subjects: 화학
• ISSN: 0253-2964; 1229-5949
• DOI: 10.5012/bkcs.2013.34.4.1065

A highly sensitive electrochemical detection method for bisphenol A (BPA) has been developed by using multi-walled carbon nanotube (CNT)-doped titania-Nafion composite modified glassy carbon (GC) electrode. The CNT−titania−Nafion/GC electrode exhibited excellent electrocatalytic activity towards BPA. Therefore, the CNT−titania−Nafion/GC electrode showed improved voltammetric responses for BPA compared to that obtained with bare GC electrode. In addition, cetyltrimethylammonium bromide (CTAB), a cationic surfactant, was added into the BPA sample solution in order to accumulate BPA through hydrophobic interaction between CTAB and BPA. The CNT−titania−Nafion/GC electrode gave a linear response (r2 = 0.999) for BPA from 1.0 × 10−8 M to 5.0 × 10−6 M with a detection limit of 9.0 × 10−10 M (S/N = 3). The modified electrode showed good selectivity against interfering species and also exhibited good reproducibility. The present electrochemical sensor based on the CNT–titania–Nafion/GC electrode was applied to the determination of BPA in food package samples. KCI Citation Count: 14