Atmospheric-pressure ionization interface for a bench-top quadrupole ion trap

Autor:	Gérard Hopfgartner, Tom G. Huggins, Jack. D. Henton, Alex V. Mordehai
Rok vydání:	1992
Předmět:	Secondary ion mass spectrometry Atmospheric pressure Chemistry Organic Chemistry Mass spectrum Analytical chemistry Turbomolecular pump Ion trap Quadrupole ion trap Mass spectrometry Quadrupole mass analyzer Spectroscopy Analytical Chemistry
Zdroj:	Rapid Communications in Mass Spectrometry. 6:508-516
ISSN:	1097-0231 0951-4198
DOI:	10.1002/rcm.1290060805
Popis:	A novel interface is described that effects the sampling and mass analysis of ions formed at atmospheric pressure into a Saturn II bench-top quadrupole ion-trap mass spectrometer. The standard high-vacuum pumping system of the system is unchanged, bit a 960L/min rotary pump is incorporated to pump the first vacuum stage of the atmospheric-pressure ion sampling interface. An ‘Electric skimmer’ ion focusing region in the first vacuum turbomolecular pump of the Sasturn II maintains high vaccuum at 4×10−4 Torr in the analyzer region while helium damping gas is introduced. By vaarying the potential difference between selected lenses in the first vacuum region the ‘declustering’ energy may be varied to decluster effectively ion/molecule dissociation mass spectra. The on-line analysis of quaternary ammonium drugs by liquid chromatography of 5 ng and 150 pg, respectively.
Databáze:	OpenAIRE
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