Volume 41, Issue 2 pp. 540-547
RESEARCH ARTICLE

Highly selective and efficient imprinted polymers based on carboxyl-functionalized magnetic nanoparticles for the extraction of gallic acid from pomegranate rind

Junjie Zhang

Corresponding Author

Junjie Zhang

Department of Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, China

Correspondence

Junjie Zhang, Department of Chemistry, School of Science, Xi'an Jiaotong University, Xi'an 710049, China.

Email: [email protected]

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Benqiang Li

Benqiang Li

Department of Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, China

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Huijuan Yue

Huijuan Yue

Department of Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, China

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Jing Wang

Jing Wang

Department of Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, China

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Yuansuo Zheng

Yuansuo Zheng

Department of Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, China

Additional correspondence author

Yuansuo Zheng

Email: [email protected]

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First published: 27 October 2017
Citations: 38

Conflict of interest: The authors declare that there are no conflicts of interest.

Abstract

With the combined surface imprinting technique and immobilized template strategy, molecularly imprinted magnetic nanoparticles were successfully prepared and coupled with high-performance liquid chromatography to selectively separate and determine gallic acid from the pomegranate rind. On the surface of carboxyl-functionalized magnetic nanospheres, thin imprinting shells were formed using dopamine as monomer and crosslinker. The characteristics, polymerization conditions, and adsorption performances of the resultant nanomaterials were investigated in detail. In addition of good crystallinity, satisfactory magnetism, and uniform morphology of the obtained polymers, they had rapid binding kinetics, high adsorption capacity, and favorable reusability. In the mixed solution of four hydroxybenzoic acids, the prepared nanomaterials have an excellent selectivity to gallic acid with an imprinting factor of as high as 17.5. Therefore, the polymers have great potentials in specific extraction and enrichment of gallic acid from the complex natural resources.