Chem. J. Chinese Universities ›› 2024, Vol. 45 ›› Issue (3): 20230487.doi: 10.7503/cjcu20230487

• Analytical Chemistry • Previous Articles     Next Articles

Preparation of Macroporous Weak Cation Exchange Chromatography Medium with High Capacity through “Grafting from” Method

GUO Wang1, JIANG Zeping1, MA Lei1, QIAO Juan1, MO Wenqing1, JIN Haibo1, HE Guangxiang1, HUANG Yongdong2, ZHANG Rongyue1()   

  1. 1.Beijing Key Laboratory of Clean Fuel and Efficient Catalytic Emission Reduction Technology,College of New Materials and Chemical Engineering,Beijing University of Petrochemical Technology,Beijing 102617,China
    2.State Key Laboratory of Biochemical Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China
  • Received:2023-11-28 Online:2024-03-10 Published:2023-12-25
  • Contact: ZHANG Rongyue E-mail:zhangrongyue@bipt.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22074148);the National Key Technologies Research and Development Program of China(2021YFC2103401)

Abstract:

Macroporous polymer chromatography medium has a low protein binding capacity due to its large pore size and low surface area. To solve this problem, the weak cation exchange chromatography medium with high capacity was prepared through the grafting polymerization of methacrylic acid on the macroporous polyacrylate microspheres, which was initiated by redox reaction. The reaction factors were evaluated and the general rules between these factors and proteins binding capacity were obtained, including monomer concentration, potassium persulfate concentration and reaction temperature. The static binding capacity and dynamic binding capacity of the obtained medium reached 252.21 and 157.25 mg/mL, respectively. It was also found that the medium with a certain ion exchange capacity could maintain 100 mg/mL protein binding capacity in 0.2 mol/L NaCl buffer. The chromatographic medium was used for the purification of lysozyme in egg white, and high purification efficiency was obtained.

Key words: Weak cation exchange chromatography medium, Macroporous polymer, Protein binding capacity, Grafting from method, Separation and purification

CLC Number: 

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