Biosensor for bisphenol A leaching from baby bottles using a glassy carbon electrode modified with DNA and single walled carbon nanotubes

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• 作者：Xiaohua Jiang (1)
  Wengjie Ding (1)
  Chonglin Luan (1)
  Qingqing Ma (2)
  Zhiyong Guo (2)
  
• 关键词：Bisphenol A leaching ; DNA ; Singed walled carbon nanotubes ; Biosensor ; Determination
• 刊名：Microchimica Acta
• 出版年：2013
• 出版时间：12 - August 2013
• 年：2013
• 卷：180
• 期：11
• 页码：1021-1028
• 全文大小：220KB
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• 作者单位：Xiaohua Jiang (1)
  Wengjie Ding (1)
  Chonglin Luan (1)
  Qingqing Ma (2)
  Zhiyong Guo (2)
  
  1. School of Applied Chemistry and Biological Technology, Shenzhen Polytechnic, Shenzhen, Guangdong, 518055, China
  2. Faculty of Materials Science and Chemical Engineering, The State Key Laboratroy Base of Novel Functional Materials and Preparation Science, Ningbo University, Ningbo, Zhejiang, 315211, China
  

文摘

We have developed a biosensor for highly sensitive and selective determination of the endocrinic disruptor bisphenol A (BPA). It is based on glassy carbon electrode modified with calf thymus DNA and a composited prepared from single walled carbon nanotubes (SWNT) and Nafion. The interaction between BPA and DNA was studied by voltammetry. The binding constant was determined to be 3.55?×-03?M?, and the binding site has a length of 4.3 base pairs. These electrochemical studies provide further information for a better understanding of the toxicity and carcinogenicity of BPA. Under optimal conditions, the biosensor displays a linear electrochemical response to BPA in the 10 nM to 20?μM concentration range, with a detection limit as low as 5.0 nM (at an S/N of 3). The method was successfully applied to the quantification of BPA in leachates from plastic baby bottles. Recoveries range from 94.0?% to 106.0?% which underpins the excellent performance of this SWNT-based DNA sensor. Figure A biosensor based on DNA and single walled carbon nanotubes modified glassy carbon electrode displays a linear electrochemical response to bisphenol A in the 10 nM to 20 μM concentration range, with a detection limit as low as 5.0 nM (at an S/N of 3).