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Reference type: Journal
Authors: Liu B, Wang XL, Lian HT, Sun XY
Article Title: Xanthine microsensor based on polypyrrole molecularly imprinted film modified carbon fiber microelectrodes.
Publication date: 2013
Journal: Analytical Biochemistry
Volume: 440
Issue: (2)
Page numbers: 220-226.
DOI: 10.1016/j.ab.2013.05.030
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0003269713002625

Abstract: A molecularly imprinted polymers (MIPs) microsensor was presented as a carbon fiber microelectrode (CFME) coating for specifically recognizing xanthine (Xan). The polymeric film was obtained based on the imprinted procedure of electropolymerization of pyrrole in the presence of the template molecule Xan by cyclic voltammetry, and template was removed by magnetic stirring. Under the optimum conditions, a satisfactory molecularly binding selectivity of Xan was obtained from the MIPs microsensor with an imprinting factor (IF) of 6.63 and a linear response to concentration in certain ranges. The ranges are from 4.0 x 10-6 to 6.0 x 10-5 M and from 8.0 x 10-5 to 2.0 x 10-3 M with a detection limit of 2.5 x 10-7 M. Meanwhile, good stability (relative standard deviation [RSD] = 3.2%, n = 10) and reproducibility (RSD = 2.0%, n = 10) were observed, and recoveries ranging from 96.9 to 102.5% were calculated when applied to Xan determination in real blood serum samples
Template and target information: xanthine, Xan
Author keywords: Carbon fiber microelectrode, Molecularly imprinted polymers, xanthine, polypyrrole

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