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Novel magnetic bovine serum albumin imprinted polymers with a matrix of carbon nanotubes, and their application to protein separation

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Abstract

Novel magnetic multi-walled carbon nanotubes@Fe3O4 molecularly imprinted polymers (MWNTs@Fe3O4-MIPs) intended for bovine serum albumin (BSA) recognition were successfully developed. The MWNTs@Fe3O4-MIPs were characterized with scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR). Scanning electron microscopy images showed that the Fe3O4 nanoparticles (diameter: 50–60 nm) were coated with a layer of MIPs with an average thickness of 25–30 nm. The magnetic material was easily dispersed and retrieved through the application of an external magnetic field. Adsorption experiments showed that the estimated maximum amount of BSA that could be adsorbed onto the MWNTs@Fe3O4-MIPs was 52.8 mg/g, and the time taken to reach equilibrium was about 40 min. Meanwhile, the MWNTs@Fe3O4-MIPs exhibited excellent selectivity towards (i.e., recognition of) BSA. The feasibility of the use of the MWNTs@Fe3O4-MIPs as a solid-phase extraction (SPE) sorbent was evaluated, and the results showed that the MWNTs@Fe3O4-MIPs were able to separate the template protein BSA from a binary protein solution. The proposed sorbent based on MWNTs@Fe3O4-MIPs for BSA separation exhibited satisfactory recoveries ranging from 92.0% to 97.3% in real samples. It was also successfully used for the purification of BSA from bovine calf serum.

Procedure for preparing magnetic protein imprinted polymers.

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Acknowledgment

This project was supported by the National Natural Science Foundation of China (no. 21005030), the Research Foundation of Education Bureau of Hunan Province, China (No.10A099), and the Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province.

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Jishou University, Jishou, 416000, China

    Zhaohui Zhang, Xiao Yang, Xing Chen, Minlei Zhang & Lijuan Luo

  2. Key Laboratory of Hunan Forest Products and Chemical Industry Engineering, Jishou University, Zhangjiajie, 427000, China

    Zhaohui Zhang & Mijun Peng

  3. State Key Laboratory of Chemo/biosensing and Chemometrics, Hunan University, Changsha, 410082, China

    Zhaohui Zhang & Shouzhuo Yao

Authors
  1. Zhaohui Zhang
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  2. Xiao Yang
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  3. Xing Chen
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  4. Minlei Zhang
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  5. Lijuan Luo
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  6. Mijun Peng
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  7. Shouzhuo Yao
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Correspondence to Zhaohui Zhang.

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Zhang, Z., Yang, X., Chen, X. et al. Novel magnetic bovine serum albumin imprinted polymers with a matrix of carbon nanotubes, and their application to protein separation. Anal Bioanal Chem 401, 2855–2863 (2011). https://doi.org/10.1007/s00216-011-5373-9

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  • DOI: https://doi.org/10.1007/s00216-011-5373-9

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