Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7592663 | Food Chemistry | 2015 | 32 Pages |
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 Lâ1 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 Ã 10â8-2.6 Ã 10â3 mol Lâ1 with a limit of detection of 5.0 Ã 10â8 mol Lâ1 (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.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Guilin Xu, Yu Chi, Lu Li, Shouhua Liu, Xianwen Kan,