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Issue 14, 2015
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Collision cross section measurements for biomolecules within a high-resolution FT-ICR cell: theory

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Abstract

In this study, an energetic hard-sphere ion–neutral collision model was proposed to bridge-link ion collision cross section (CCS) with the image current collected from a high-resolution Fourier transform ion cyclotron resonance (FT-ICR) cell. By investigating the nonlinear effects induced by high-order electric fields and image charge forces, the energetic hard-sphere collision model was validated through experiments. Suitable application regions for the energetic hard-sphere collision model, as well as for the conventional Langevin and hard-sphere collision models, were also discussed. The energetic hard-sphere collision model was applied in the extraction of ion CCSs from high-resolution FT-ICR mass spectra. Discussions in the present study also apply to FT-Orbitraps and FT-quadrupole ion traps.

Graphical abstract: Collision cross section measurements for biomolecules within a high-resolution FT-ICR cell: theory

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Supplementary files

Article information


Submitted
26 Dec 2014
Accepted
26 Feb 2015
First published
02 Mar 2015

Phys. Chem. Chem. Phys., 2015,17, 9060-9067
Article type
Paper
Author version available

Collision cross section measurements for biomolecules within a high-resolution FT-ICR cell: theory

D. Guo, Y. Xin, D. Li and W. Xu, Phys. Chem. Chem. Phys., 2015, 17, 9060
DOI: 10.1039/C4CP06065B

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