TITLE:
An Amperometric Sensor for Sunset Yellow FCF Detection Based on Molecularly Imprinted Polypyrrole
AUTHORS:
Jinfeng Xu, Yi Zhang, Hao Zhou, Mingwei Wang, Peidong Xu, Juankun Zhang
KEYWORDS:
Electrochemical Sensor; Polypyrrole; Sunset Yellow FCF; Molecularly Imprinted Polymers
JOURNAL NAME:
Engineering,
Vol.4 No.10B,
October
21,
2013
ABSTRACT: An
electrochemical method for fast detecting the concentration of sunset yellow
FCF in wine samples was developed in this study. The sensor based on imprinted
films which fabricated by electropolymerization of pyrrole on a glassy carbon
electrode in the presence of sunset yellow FCF as the template. Comparing to
the polypyrrole non-imprinted modified (NIP) electrode, the polypyrrole
molecularly imprinted polymer (MIP) electrode improved the electrochemical
performance of the sensor significantly. The peak current at about 0.26 V was
linear with the concentration of sunset yellow FCF from 0.4 to 2 μM and from 2 to 8 μM. It can be used for more than 10 times to maintain a stable
response result. The sensor had the good selectivity on sunset yellow FCF,
amaranth and tartrazine, which the selection factors were 1.00, 0.80 and 0.85，respectively.