Open AccessAn aerodynamic drag model for protein ions
Author(s) -
D. J. Douglas
Publication year - 1994
Publication title -
journal of the american society for mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.961
H-Index - 127
eISSN - 1879-1123
pISSN - 1044-0305
DOI - 10.1016/1044-0305(94)85079-8
Subject(s) - drag , projectile , chemistry , knudsen number , aerodynamics , aerodynamic drag , drag coefficient , inert gas , collision , ion , mechanics , physics , computer security , organic chemistry , quantum mechanics , computer science
The energy losses of protein ions passing through a collision cell filled with inert gas have been modeled as the aerodynamic drag on a projectile at high Knudsen number. When applied to the energy loss data of Covey and Douglas (J. Am. Soc. Mass Spectrom. 1993, 4, 616-623) with drag coefficients from the gas dynamics literature, derived protein cross sections are ∼0.8 of those found with the simple collision model used by Covey and Douglas.