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Title: Apparatus for preparing a sample for mass spectrometry

An apparatus is described for preparing a sample for analysis by a mass spectrometer system. The apparatus has an entry chamber and an ionization chamber separated by a skimmer. A capacitor having two space-apart electrodes followed by one or more ion-imaging lenses is disposed in the ionization chamber. The chamber is evacuated and the capacitor is charged. A valve injects a sample gas in the form of sample pulses into the entry chamber. The pulse is collimated by the skimmer and enters the ionization chamber. When the sample pulse passes through the gap between the electrodes, it discharges the capacitor and is thereby ionized. The ions are focused by the imaging lenses and enter the mass analyzer, where their mass and charge are analyzed. 1 figures.
Inventors:
Issue Date:
OSTI Identifier:
7107664
Assignee:
Dept. of Energy, Washington, DC (United States) PTO; EDB-94-102367
Patent Number(s):
US 5311016; A
Application Number:
PPN: US 7-933151
Contract Number:
AC09-89SR18035
Resource Relation:
Patent File Date: 21 Aug 1992
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; MASS SPECTROMETERS; SAMPLE HOLDERS; MASS SPECTROSCOPY; SAMPLE PREPARATION; DESIGN; IONIZATION; OPERATION; MEASURING INSTRUMENTS; SPECTROMETERS; SPECTROSCOPY; 400102* - Chemical & Spectral Procedures