Citation: ZHANG Xin, LI Yan-Song, TANG Bo, ZHANG Hao, JIAO Peng-Fei, WEI Yu-Ping, WANG Peng. Preparation of Magnetic Molecularly Imprinted Microspheres for Selective Separation of Ursolic Acid[J]. Chinese Journal of Analytical Chemistry, ;2021, 49(4): 628-635. doi: 10.19756/j.issn.0253-3820.201603 shu

Preparation of Magnetic Molecularly Imprinted Microspheres for Selective Separation of Ursolic Acid

ZHANG Xin ^1,, ,
LI Yan-Song ¹ ,
TANG Bo ² ,
ZHANG Hao ¹ ,
JIAO Peng-Fei ¹ ,
WEI Yu-Ping ¹ ,
WANG Peng ¹

1.
School of Life Science and Technology, Nanyang Normal University, Nanyang 473061, China;
2.
School of Life Science, Beijing Institute of Technology, Beijing 100081, China

Corresponding author: ZHANG Xin, 21588330@qq.com
Received Date: 14 October 2020
Revised Date: 12 January 2021

Fund Project: Supported by the Key Scientific Research Projects of Higher Education Institutions in Henan Province, China (No. 20A180021) and the Scientific Research Projects of Nanyang Normal University (No. 2019ZX011).

The magnetic molecularly imprinted nanoparticles were prepared by surface molecular imprinting technology with Fe₃O₄ magnetic nanoparticles as matrix material, ursolic acid as template molecule and 3-aminopropyl triethoxysilane as functional monomer. The prepared magnetic molecularly imprinted nanoparticles were used for rapid separation of ursolic acid with high selectivity. These resulting nanocomposites were well characterized by transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM). The adsorption performance of the magnetic molecularly imprinted nanoparticles was investigated by adsorption kinetics and adsorptionisotherm experiments. Experimental results showed that the maximum adsorption capacity of the magnetic molecularly imprinted microspheres for ursolic acid was 58.17 mg/g, and the imprinting factor was 3.65. Moreover, the prepared magnetic molecularly imprinted nanospheres showed good stability and repeatability, and could be used for the adsorption of ursolic acid with recoveries of 96.5%-97.8% and RSD of 2.2%-3.1% (n=5). The proposed ursolic acid magnetic molecularly imprinted microspheres were demonstrated to be simple, environment friendly, and high sensitive in rapid separation and extraction of ursolic acid.
- Molecularly imprinted,
- Magnetic nanospheres,
- Ursolic acid,
- Selective separation
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