@article {5190,
	title = {Ion fragmentation in an electrospray ionization mass spectrometer interface with different gases},
	journal = {Rapid Communications in Mass Spectrometry},
	volume = {15},
	number = {4},
	year = {2001},
	note = {ISI Document Delivery No.: 405PTTimes Cited: 12Cited Reference Count: 43},
	pages = {249-257},
	type = {Article},
	abstract = {Nitrogen, argon, and krypton are used as curtain gases in an electrospray ionization mass spectrometer in an attempt to study the effect of these gases on the extent of ion fragmentation between the orifice and the skimmer of the interface region. A previously published collision model predicts that the degree of ion fragmentation increases with increasing mass of the curtain gas. However, the fragmentation yields are found to be the opposite to that expected. It is believed that the reversed trend with argon and krypton is caused by condensation of the gases within the free jet expansion between the orifice and the skimmer. A condensation parameter can be used to predict the degree of clustering of gases within a free jet expansion. When the condensation parameter is minimized, the predicted trend of fragmentation with mass is observed. Copyright (C) 2001 John Wiley \& Sons, Ltd.},
	keywords = {CONDENSATION, FREE-JET EXPANSIONS, INDUCED DISSOCIATION, LIQUID-HELIUM CLUSTERS, MYOGLOBIN, PERFORMANCE, PROTEIN IDENTIFICATION, SPECTROSCOPY, TECHNOLOGY, TEMPERATURE},
	isbn = {0951-4198},
	url = {<Go to ISI>://000167168800002},
	author = {Schneider, B. S. and Douglas, D. J. and Chan, D. D. Y.}
}
@article {4245,
	title = {Applications of collision dynamics in quadrupole mass spectrometry},
	journal = {Journal of the American Society for Mass Spectrometry},
	volume = {9},
	number = {2},
	year = {1998},
	note = {ISI Document Delivery No.: YT841Times Cited: 50Cited Reference Count: 44},
	month = {Feb},
	pages = {101-113},
	type = {Article},
	abstract = {Some applications of collision dynamics in the field of quadrupole mass spectrometry are presented. Previous data on the collision induced dissociation of ions in triple quadrupole mass spectrometers is reviewed. A new method to calculate the internal energy distribution of activated ions directly from the increase in the cross section for dissociation with center of mass energy is presented. This method, although approximate, demonstrates explicitly the high efficiency of transfer of translational to internal energy of organic ions. It is argued that at eV center of mass energies, collisions between protein ions and neutrals such as Ar are expected to be highly inelastic. The discovery and application of collisional cooling in radio frequency quadrupoles is reviewed. Some previously unpresented data on fragment ion energies in triple quadrupole tandem mass spectrometry are shown that demonstrate directly the loss of kinetic energy of fragment ions in the cooling process. The development of the energy loss method to measure collision cross sections of protein ions in triple quadrupole instruments is reviewed along with a new discussion of the effects of inelastic collisions in these experiments and related ion mobility experiments. (C) 1998 American Society for Mass Spectrometry.},
	keywords = {ACTIVATION, BOND-ENERGIES, GAS-PHASE, INDUCED DISSOCIATION, ION FRAGMENTATION, IONS, MECHANISM, MOLECULES, POLYATOMIC, SIZE, TRIPLE QUADRUPOLE},
	isbn = {1044-0305},
	url = {<Go to ISI>://000071650400001},
	author = {Douglas, D. J.}
}
