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Reference type: Journal
Authors: Xu GL, Chi Y, Li L, Liu SH, Kan XW
Article Title: Imprinted propyl gallate electrochemical sensor based on graphene/single walled carbon nanotubes/sol-gel film.
Publication date: 2015
Journal: Food Chemistry
Volume: 177
Page numbers: 37-42.
DOI: 10.1016/j.foodchem.2014.12.097
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0308814614020202

Abstract: A novel imprinted sol-gel electrochemical sensor for the determination of propyl gallate (PG) was developed based on a composite of graphene and single walled carbon nanotubes (GR-SWCNTs). It was fabricated by stepwise modifying GR-SWCNTs and molecularly imprinted polymers and stored in 0.10 mol L-1 phosphate buffer solution pH 6.0, which endowed the sensor good sensitivity and selective recognition towards template molecules. The morphology and specific adsorption capacity of the sensor was characterized by scanning electron microscope and electrochemical methods, respectively. Under the optimized conditions, a linear range of the sensor to PG was 8.0 x 10-8 - 2.6 x 10-3 mol L-1 with a limit of detection of 5.0 x 10-8 mol L-1 (S/N = 3). The sensor exhibited specificity and selectivity towards template molecules as well as excellent reproducibility, regeneration and stability. Furthermore, the sensor could be applied to determine PG in edible oils, instant noodles and cookies with satisfactory results
Template and target information: propyl gallate, PG
Author keywords: Imprinted sol-gel electrochemical sensor, Graphene, Single walled carbon nanotubes, Propyl gallate

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