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Gas Flow and Ion Transfer in Heated ESI Capillary Interfaces
Citation key doi:10.1021/jasms.8b05795
Author Bernier, Laurent and Pinfold, Harry and Pauly, Matthias and Rauschenbach, Stephan and Reiss, Julius
Pages 761-773
Year 2018
DOI 10.1021/jasms.8b05795
Journal Journal of the American Society for Mass Spectrometry
Volume 29
Number 4
Note PMID: 29468502
Abstract Transfer capillaries are the preferred means to transport ions, generated by electrospray ionization, from ambient conditions to vacuum. During the transfer of ions through the narrow, long tubes into vacuum, substantial losses are typical. However, recently it was demonstrated that these losses can be avoided altogether. To understand the experimental observation and provide a general model for the ion transport, here, we investigate the ion transport through capillaries by numerical simulation of interacting ions. The simulation encompasses all relevant factors, such as space charge, diffusion, gas flow, and heating. Special attention is paid to the influence of the gas flow on the transmission and especially the change imposed by heating. The gas flow is modeled by a one-dimensional gas dynamics description. A large number of ions are treated as point particles in this gas flow. This allows to investigate the influence of the capillary heating on the gas flow and by this on the ion transport. The results are compared with experimental findings.
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