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Title: Apparatus for preparing a sample for mass spectrometry

An apparatus 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. (Aiken, SC)
Issue Date:
OSTI Identifier:
United States of America as represented by United State (Washington, DC) SRS
Patent Number(s):
US 5311016
Contract Number:
Research Org:
Country of Publication:
United States
apparatus; preparing; sample; mass; spectrometry; analysis; spectrometer; entry; chamber; ionization; separated; skimmer; capacitor; space-apart; electrodes; followed; ion-imaging; lenses; disposed; evacuated; charged; valve; injects; gas; form; pulses; pulse; collimated; enters; passes; gap; discharges; ionized; focused; imaging; enter; analyzer; charge; analyzed; sample pulse; mass spectrometer; mass spectrometry; sample gas; ionization chamber; mass analyzer; chamber separated; pulse passes; imaging lenses; imaging lens; apart electrodes; /250/