Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (3): 717.doi: 10.7503/cjcu20200685

• Analytical Chemistry • Previous Articles     Next Articles

Arginine Functionalized Magnetic Nanoparticles and Its Application in Phosphopeptides Enrichment

ZHENG Haijiao1, JIANG Liyan2, JIA Qiong1()   

  1. 1.College of Chemistry
    2.College of Life Sciences,Jilin University,Changchun 130012,China
  • Received:2020-09-15 Online:2021-03-10 Published:2021-03-08
  • Contact: JIA Qiong E-mail:jiaqiong@jlu.edu.cn
  • Supported by:
    ? Supported by the Jilin Provincial Science & Technology Department, China(20190201079JC);the China Postdoctoral Science Foundation(2019M651193)

Abstract:

Arginine modified magnetic nanoparticles(Mag-Arg) were synthesized and used as themagnetic carrier of magnetic solid phase extraction(MSPE) platform. The prepared magnetic nanoparticles were applied to the enrichment of phosphopeptides from complex samples coupled with MALDI-TOF MS. Mag-Arg was characterized by means of scanning electron microscopy, particle size analysis, Zeta potential measurement, infrared spectroscopy, vibrating sample magnetometer and X-ray diffraction. Under the optimal adsorption desorption conditions, the MSPE-MS platform could achieve high selectivity and sensitivity(the detection limit was determined to be as low as 0.1 fmol) for phosphopeptides. Finally, the method was applied to the determination of phosphopeptides in nonfat milk, showing great potential in the detection of low-abundance phosphopeptides in real complex biological samples.

Key words: Magnetic Nanoparticle, Arginine, Magnetic solid phase extraction, Phosphopepties, Mass spectrometry

CLC Number: 

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