Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7585303 | Food Chemistry | 2018 | 6 Pages |
Abstract
We report the development of a molecularly imprinted polymers-surface-enhanced Raman spectroscopy (MIPs-SERS) method for rapid detection and quantification of a herbicide residue 2,4-dichlorophenoxyacetic acid (2,4-D) in milk. MIPs were synthesized via bulk polymerization and utilized as solid phase extraction sorbent to selectively extract and enrich 2,4-D from milk. Silver nanoparticles were synthesized to facilitate the collection of SERS spectra of the extracts. Based on the characteristic band intensity of 2,4-D (391â¯cmâ1), the limit of detection was 0.006â¯ppm and the limit of quantification was 0.008â¯ppm. A simple logarithmic working range (0.01-1â¯ppm) was established, satisfying the sensitivity requirement referring to the maximum residue level of 2,4-D in milk in both Europe and North America. The overall test of 2,4-D for each milk sample required only 20â¯min including sample preparation. This MIPs-SERS method has potential for practical applications in detecting 2,4-D in agri-foods.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Marti Z. Hua, Shaolong Feng, Shuo Wang, Xiaonan Lu,