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Int. J. Mol. Sci. 2014, 15(1), 574-587; doi:10.3390/ijms15010574

Atrazine Molecular Imprinted Polymers: Comparative Analysis by Far-Infrared and Ultraviolet Induced Polymerization

1
Pesticide Research Institute, Hunan Agricultural University, Changsha 410128, China
2
School of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang 453003, China
3
Hunan Academy of Agricultural Sciences, Changsha 410128, China
*
Authors to whom correspondence should be addressed.
Received: 11 November 2013 / Revised: 26 December 2013 / Accepted: 30 December 2013 / Published: 6 January 2014
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Abstract

Atrazine molecular imprinted polymers (MIPs) were comparatively synthesized using identical polymer formulation by far-infrared (FIR) radiation and ultraviolet (UV)-induced polymerization, respectively. Equilibrium binding experiments were carried out with the prepared MIPs; the results showed that MIPuv possessed specific binding to atrazine compared with their MIPFIR radiation counterparts. Scatchard plot’s of both MIPs indicated that the affinities of the binding sites in MIPs are heterogeneous and can be approximated by two dissociation-constants corresponding to the high- and low-affinity binding sites. Moreover, several common pesticides including atrazine, cyromazine, metamitron, simazine, ametryn, terbutryn were tested to determine their specificity, similar imprinting factor (IF) and different selectivity index (SI) for both MIPs. Physical characterization of the polymers revealed that the different polymerization methods led to slight differences in polymer structures and performance by scanning electron microscope (SEM), Fourier transform infrared absorption (FT-IR), and mercury analyzer (MA). Finally, both MIPs were used as selective sorbents for solid phase extraction (SPE) of atrazine from lake water, followed by high performance liquid chromatography (HPLC) analysis. Compared with commercial C18 SPE sorbent (86.4%–94.8%), higher recoveries of atrazine in spiked lake water were obtained in the range of 90.1%–97.1% and 94.4%–101.9%, for both MIPs, respectively.
Keywords: atrazine; molecular imprinted polymers; far-infrared induced; ultraviolet induced atrazine; molecular imprinted polymers; far-infrared induced; ultraviolet induced
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Chen, J.; Bai, L.-Y.; Liu, K.-F.; Liu, R.-Q.; Zhang, Y.-P. Atrazine Molecular Imprinted Polymers: Comparative Analysis by Far-Infrared and Ultraviolet Induced Polymerization. Int. J. Mol. Sci. 2014, 15, 574-587.

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