ISSN:
0951-4198
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Physics
Notes:
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.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/rcm.1290060805
