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Review
. 2021 Dec;413(29):7147-7156.
doi: 10.1007/s00216-021-03511-4. Epub 2021 Jul 8.

Requirements and attributes of nano-resonator mass spectrometry for the analysis of intact viral particles

Kavya Clement  1   2   3 , Adrien Reynaud  3   4 , Martial Defoort  3   4   5 , Bogdan Vysotskyi  3   4   6 , Thomas Fortin  1 , Szu-Hsueh Lai  1   2 , Vaitson Çumaku  1   3 , Sergio Dominguez-Medina  1   2   3 , Sébastien Hentz  7   8 , Christophe Masselon  9   10
Affiliations
Review

Requirements and attributes of nano-resonator mass spectrometry for the analysis of intact viral particles

Kavya Clement et al. Anal Bioanal Chem. 2021 Dec.

Abstract

When studying viruses, the most prevalent aspects that come to mind are their structural and functional features, but this leaves in the shadows a quite universal characteristic: their mass. Even if approximations can be derived from size and density measurements, the multi MDa to GDa mass range, featuring a majority of viruses, has so far remained largely unexplored. Recently, nano-electromechanical resonator-based mass spectrometry (NEMS-MS) has demonstrated the ability to measure the mass of intact DNA filled viral capsids in excess of 100 MDa. However, multiple factors have to be taken in consideration when performing NEMS-MS measurements. In this article, phenomena influencing NEMS-MS mass estimates are listed and discussed, including some particle's extraneous physical properties (size, aspect ratio, stiffness), and the influence of frequency noise and device fabrication defects. These factors being accounted for, we could begin to notice subtler effects linked with (e.g.) particle desolvation as a function of operating parameters. Graphical abstract.

Keywords: Mass measurements; Nano-resonator mass spectrometry; Viral particle.

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