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J Colloid Interface Sci. 2018 Apr 1;515:18-26. doi: 10.1016/j.jcis.2018.01.001. Epub 2018 Jan 3.

Bifunctional monomer magnetic imprinted nanomaterials for selective separation of tetracyclines directly from milk samples.

Author information

1
School of Science, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China; Department of Urology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China.
2
School of Science, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
3
School of Science, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China. Electronic address: ruixiagao@mail.xjtu.edu.cn.
4
Department of Urology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China.
5
Department of Urology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China. Electronic address: tangxiaos@sina.com.

Abstract

Novel magnetic molecularly imprinted nanomaterials (DA + BSA-MMIPs) were prepared adopting bovine serum albumin (BSA) and dopamine as bifunctional monomers for the first time. Besides the role of assistant functional monomer, BSA can exclude the proteins with like charges and promote low molecular weight tetracyclines to be adsorbed. Thus, the DA + BSA-MMIPs could fulfil the selective separation of tetracyclines directly from milk samples. The characteristics, polymerization conditions, and adsorption performances of the resultant nanomaterials were investigated in detail. In addition of uniform imprinting layers, stable crystalline phase, and good magnetism of the DA + BSA-MMIPs, they have rapid binding kinetic, high adsorption capacity, and favorable reusability. The imprinted nanomaterials were coupled with HPLC to selectively extract and determine trace tetracyclines from untreated milk samples. The recoveries of tetracyclines are in the range of 84.1-95.8% with relative standard deviations of less than 6.7%. The developed method is especially suitable for the selective enrichment and detection of target compounds directly from a complex sample with proteins.

KEYWORDS:

Bifunctional monomers; Magnetic separation; Milk; Molecularly imprinted polymers; Tetracyclines

PMID:
29324271
DOI:
10.1016/j.jcis.2018.01.001

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