Title of article
Highly sensitive phenolic biosensor based on magnetic polydopamine-laccase-Fe3O4 bionanocomposite
Author/Authors
Li، نويسنده , , Yunyong and Qin، نويسنده , , Cong and Chen، نويسنده , , Chao and Fu، نويسنده , , Yingchun and Ma، نويسنده , , Ming and Xie، نويسنده , , Qingji، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2012
Pages
8
From page
46
To page
53
Abstract
New polydopamine (PDA)-laccase (Lac)-Fe3O4 magnetic polymeric bionanocomposites (MPBNCs) were prepared through one-pot Lac-catalyzed oxidation of dopamine in an aqueous suspension containing Lac, magnetic Fe3O4 nanoparticles and dopamine. A PDA-Lac-Fe3O4/Au electrode was prepared by facile and efficient magnetic separation/immobilization of the MPBNCs on a magnetic Au electrode for biosensing of hydroquinone (HQ), giving a sensitivity of 374 μA mmol−1 L cm−2, a limit of detection of 30 nmol L−1, as well as good selectivity and stability. The biosensing electrode was also used for HQ analysis in real sample matrices with satisfactory results.
Keywords
Enzymatic synthesis , Dopamine , Phenolic biosensor , Laccase (Lac) , Magnetic polymeric bionanocomposites (MPBNCs)
Journal title
Sensors and Actuators B: Chemical
Serial Year
2012
Journal title
Sensors and Actuators B: Chemical
Record number
1440640
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