Chem. J. Chinese Universities ›› 2024, Vol. 45 ›› Issue (11): 20240325.doi: 10.7503/cjcu20240325

• Article • Previous Articles     Next Articles

Plasmonic Composites Aid Semi-quantitative Analysis and Identification of Low-molecular-weight Metabolites by Mass Spectrometry

CAO Ting, SHU Weikang(), WAN Jingjing()   

  1. School of Chemistry and Molecular Engineering,East China Normal University,Shanghai 200241,China
  • Received:2024-07-01 Online:2024-11-10 Published:2024-09-25
  • Contact: SHU Weikang E-mail:wkshu@chem.ecnu.edu.cn;jjwan@chem.ecnu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22122404)

Abstract:

DMSN@Ag/Au composites, with DMSN(dendritic mesoporous silica nanosphere), as the support and Au/Ag nanoparticles homogeneously loading on the surface, were employed as MALDI(matrix-assisted laser desorption/ionization) matrices. These composites enable highly sensitive MALDI metabolic analysis with a detection limit of 0.005 mg/mL. Moreover, these composites demonstrated good reproducibility in detection and provided an intrinsic Au+ signal as a reference to enhance the accuracy of quantitative analysis. Additionally, DMSN@Ag/Au facilitated Ag+ addition to the analyte and assisted in metabolite identification process. The composites are expected to serve as a new generation of multifunctional MALDI matrix and provide new ideas for clinical mass spectrometry analysis.

Key words: Matrix-assisted laser desorption/Ionization mass spectrometry, Low-molecular-weight metabolites detection, Dendritic mesoporous silica nanosphere, Plasmonic material

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