A molecularly imprinted polymer with integrated gold nanoparticles for surface enhanced Raman scattering based detection of the triazine herbicides, prometryn and simetryn
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A class-specific molecular imprinted polymer (MIP) is described for simultaneous recognition of prometryn and simetryn prior to their determination via a fingerprint signal (at 974 cm−1 and 1074 cm−1) in the surface enhanced Raman scattering (SERS) spectra that were acquired in the presence of gold nanoparticles. The imprinted nanoparticles were applied to the analysis of rice and wheat samples spiked with both herbicides. The method has fairly good recoveries (72.7–90.9%) with a relative standard deviation of 1.7–7.8%, and a 20 μg·kg−1 limit of detection. The imprint factors (compared to non-imprinted polymers) are 5.3 for prometryn and 4.2 for simetryn (both at 10 μg·mL−1 of the initial solution).
KeywordsSimultaneous detection Herbicides Molecular imprint Food safety AuNPs Portable Raman spectrometer Matrix interference Multi-residues Grain
The authors are grateful to the National Natural Science Foundation of China (contact No. 31471654, 31772071, and 31501571) and the China Agriculture Research System (NO. CARS-05-05A-03).
Compliance with ethical standards
The author(s) declare that they have no competing interests.
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