@article {4528,
	title = {Elemental analysis with quadrupole mass filters operated in higher stability regions},
	journal = {Journal of Analytical Atomic Spectrometry},
	volume = {14},
	number = {8},
	year = {1999},
	note = {ISI Document Delivery No.: 229LPTimes Cited: 23Cited Reference Count: 47},
	month = {Aug},
	pages = {1111-1119},
	type = {Article},
	abstract = {Operation of quadrupole mass filters in higher zones of stability is described with an emphasis on the potential for elemental mass spectrometry. The higher zones allow a resolution at half height of up to 9000 on atomic ions and make possible unit resolution on ions with kinetic energies up to several thousand electron volts. The theory of quadrupole operation is briefly reviewed. Operation of quadrupoles in the third stability region with Mathieu parameters (a,q)approximate to(3,3) and the second stability region with (a,q)approximate to(0.02, 7.55) is described in detail. Previously unpublished data showing the variation of resolution with ion energy are presented. The variation of transmission with resolution is compared with previous calculations and with new calculations presented here.},
	keywords = {2ND, ANALYZER, ATMOSPHERE, DIAGRAM, HELIUM, HIGH-RESOLUTION, ICP-MS, SEPARATION MODE, SPECTROMETER, ZONE},
	isbn = {0267-9477},
	url = {<Go to ISI>://000082196300002},
	author = {Du, Z. H. and Douglas, D. J. and Konenkov, N.}
}
@article {3861,
	title = {High resolution inductively coupled plasma mass spectra with a quadrupole mass filter},
	journal = {Rapid Communications in Mass Spectrometry},
	volume = {10},
	number = {6},
	year = {1996},
	note = {ISI Document Delivery No.: UJ502Times Cited: 26Cited Reference Count: 30},
	pages = {649-652},
	type = {Article},
	abstract = {{An inductively coupled plasma mass spectrometer (ICP-MS) system is described in which the quadrupole mass filter can be operated conventionally or in the {\textquoteright}second{\textquoteright} stability region (with Mathieu parameters q=7.547},
	keywords = {2ND STABILITY REGION, DIAGRAM, SEPARATION, SPECTROMETRY, ZONE},
	isbn = {0951-4198},
	url = {<Go to ISI>://A1996UJ50200008},
	author = {Ying, J. F. and Douglas, D. J.}
}
