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Reference type: Journal
Authors: Hua MZ, Feng SL, Wang S, Lu XN
Article Title: Rapid detection and quantification of 2,4-dichlorophenoxyacetic acid in milk using molecularly imprinted polymers-surface-enhanced Raman spectroscopy.
Publication date: 2018
Journal: Food Chemistry
Volume: 258
Page numbers: 254-259.
DOI: 10.1016/j.foodchem.2018.03.075
Alternative URL: https://www.sciencedirect.com/science/article/pii/S0308814618305089

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 (391 cm-1), the limit of detection was 0.006 ppm and the limit of quantification was 0.008 ppm. A simple logarithmic working range (0.01-1 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 20 min including sample preparation. This MIPs-SERS method has potential for practical applications in detecting 2,4-D in agri-foods
Template and target information: 2,4-dichlorophenoxyacetic acid, 2,4-D
Author keywords: SERS, molecular imprinting, artificial antibody, 2,4-D, milk, food safety


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