TITLE:
Formaldehyde Biosensor with Formaldehyde Dehydrogenase Adsorped on Carbon Electrode Modified with Polypyrrole and Carbon Nanotube
AUTHORS:
Mingwei Wang, Shuhai Jiang, Yi Chen, Xiang Chen, Li Zhao, Juankun Zhang, Jinfeng Xu
KEYWORDS:
Formaldehyde Dehydrogenase; Eletrostatic Self-assembly; Biosensor
JOURNAL NAME:
Engineering,
Vol.4 No.10B,
October
21,
2013
ABSTRACT:
In this study, a carbon electrode electroless
polymerization of polypyrrole, which formed a layer of conductive film
interface,then absorped a layer of carbon nanotube particles by the way of
self-assembled, is studied. The modified electrode is used to electrostatic adherence
of formaldehyde dehydrogenase, with Nafion solution capped. Moreover this paper
discusses the work of electrode position,
PH value and scanning speed on the influence of the electrode response,
the response potential is -1.2v, the optimal PH value is 7.5, and we also
review the linear range of this electrode, we discovered taht this biosensor
have a good linear relationship with the concentration of 1ug/ml-360ug/ml, the
Correlation coefficient is 0.9983. In addition,with the stability of this electrode
tested, it can be stored 15d at4°C.