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Title: Noise reduction in negative-ion quadrupole mass spectrometry

Abstract

A quadrupole mass spectrometer (QMS) system is described having an ion source, quadrupole mass filter, and ion collector/recorder system. A weak, transverse magnetic field and an electron collector are disposed between the quadrupole and ion collector. When operated in negative ion mode, the ion source produces a beam of primarily negatively-charged particles from a sample, including electrons as well as ions. The beam passes through the quadrupole and enters the magnetic field, where the electrons are deflected away from the beam path to the electron collector. The negative ions pass undeflected to the ion collector where they are detected and recorded as a mass spectrum.

Inventors:
Issue Date:
OSTI Identifier:
6260685
Patent Number(s):
5204530 A
Application Number:
PPN: US 7-813730
Assignee:
IMS; EDB-93-121420
DOE Contract Number:  
AC09-89SR18035
Resource Type:
Patent
Resource Relation:
Patent File Date: 27 Dec 1991
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 47 OTHER INSTRUMENTATION; MASS SPECTROMETERS; DESIGN; OPERATION; ELECTRONS; FILTERS; ION SOURCES; IONS; MAGNETIC FIELDS; MASS SPECTRA; MASS SPECTROSCOPY; MATERIALS; PARTICLE PRODUCTION; QUADRUPOLES; CHARGED PARTICLES; ELEMENTARY PARTICLES; FERMIONS; LEPTONS; MEASURING INSTRUMENTS; MULTIPOLES; SPECTRA; SPECTROMETERS; SPECTROSCOPY; 400102* - Chemical & Spectral Procedures; 440800 - Miscellaneous Instrumentation- (1990-)

Citation Formats

Chastagner, P. Noise reduction in negative-ion quadrupole mass spectrometry. United States: N. p., 1993. Web.
Chastagner, P. Noise reduction in negative-ion quadrupole mass spectrometry. United States.
Chastagner, P. Tue . "Noise reduction in negative-ion quadrupole mass spectrometry". United States.
@article{osti_6260685,
title = {Noise reduction in negative-ion quadrupole mass spectrometry},
author = {Chastagner, P},
abstractNote = {A quadrupole mass spectrometer (QMS) system is described having an ion source, quadrupole mass filter, and ion collector/recorder system. A weak, transverse magnetic field and an electron collector are disposed between the quadrupole and ion collector. When operated in negative ion mode, the ion source produces a beam of primarily negatively-charged particles from a sample, including electrons as well as ions. The beam passes through the quadrupole and enters the magnetic field, where the electrons are deflected away from the beam path to the electron collector. The negative ions pass undeflected to the ion collector where they are detected and recorded as a mass spectrum.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {4}
}