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Magnetic molecularly imprinted polymers based on carbon nanotubes for extraction of carbamates

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Abstract

A fast and economical method has been developed for the preconcentration of the carbamates propoxur, pirimicarb and promecarb by using magnetic molecularly imprinted polymers (m-MIPs). Propoxur was applied as the template for the analytes, and carbon nanotubes as a supporting template. The effects of the amount of magnetic sorbent, shaking time and rate, eluting solution on the extraction efficiency were studied. The processes of adsorption and desorption occur within 25 min, and the m-MIPs can be collected by applying an external magnetic field within 15 s. The m-MIPs were characterized by using FTIR, transmission electron microscopy, and with a vibrating sample magnetometer. The pesticides were quantified by HPLC with UV detection. Recoveries of spiked samples range from 90.5 to 98.6 %, and the lower  detection limits range from 9.7 to 12.0 μg kg−1. The method is selective and convenient. The m-MIPs were successfully applied to enrich and determine the carbamates in spiked homogenates of apples, oranges and pears.

Extraction process using magnetic molecularly imprinted polymers. The m-MIPs were prepared using proporxur as the template molecular, carbon nanotubes as supporter and Fe3O4 as the magnetic component. The m-MIPs were successfully applied to determine the carbamates in fruit samples with recoveries that range from 90.5 to 98.6 %.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (No. 21205010).

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Authors and Affiliations

  1. Department of Chemistry, College of Science, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, China

    Lei Gao, Ligang Chen & Xiaowan Li

Authors
  1. Lei Gao
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  2. Ligang Chen
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  3. Xiaowan Li
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Corresponding author

Correspondence to Ligang Chen.

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Gao, L., Chen, L. & Li, X. Magnetic molecularly imprinted polymers based on carbon nanotubes for extraction of carbamates. Microchim Acta 182, 781–787 (2015). https://doi.org/10.1007/s00604-014-1388-1

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  • DOI: https://doi.org/10.1007/s00604-014-1388-1

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