Highly sensitive electrochemical biosensor for bisphenol A detection based on a diazonium-functionalized boron-doped diamond electrode modified with a multi-walled carbon nanotube-tyrosinase hybrid film

Biosens Bioelectron. 2015 Dec 15:74:830-5. doi: 10.1016/j.bios.2015.07.051. Epub 2015 Jul 26.

Abstract

A highly sensitive electrochemical biosensor for the detection of Bisphenol A (BPA) in water has been developed by immobilizing tyrosinase onto a diazonium-functionalized boron doped diamond electrode (BDD) modified with multi-walled carbon nanotubes (MWCNTs). The fabricated biosensor exhibits excellent electroactivity towards o-quinone, a product of this enzymatic reaction of BPA oxidation catalyzed by tyrosinase. The developed BPA biosensor displays a large linear range from 0.01 nM to 100 nM, with a detection limit (LOD) of 10 pM. The feasibility of the proposed biosensor has been demonstrated on BPA spiked water river samples. Therefore, it could be a promising and reliable analytical tool for on-site monitoring of BPA in waste water.

Keywords: Biosensor; Bisphenol A; Diamond electrode; Diazonium; Tyrosinase.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Benzhydryl Compounds / chemistry
  • Benzhydryl Compounds / isolation & purification*
  • Biosensing Techniques*
  • Boron / chemistry
  • Diazonium Compounds
  • Electrochemistry*
  • Enzymes, Immobilized / chemistry
  • Limit of Detection
  • Monophenol Monooxygenase / chemistry
  • Nanotubes, Carbon / chemistry*
  • Phenols / chemistry
  • Phenols / isolation & purification*
  • Wastewater / chemistry

Substances

  • Benzhydryl Compounds
  • Diazonium Compounds
  • Enzymes, Immobilized
  • Nanotubes, Carbon
  • Phenols
  • Waste Water
  • Monophenol Monooxygenase
  • bisphenol A
  • Boron