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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 cha

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.

대표청구항 ▼

An apparatus for preparing a sample fluid for analysis with a mass spectrometer, said apparatus comprising: a chamber; a pulsed valve for injecting said sample fluid into said chamber, said pulsed valve having a pulse duration; and a capacitor carried within said chamber for ionizing at least a port

An apparatus for preparing a sample fluid for analysis with a mass spectrometer, said apparatus comprising: a chamber; a pulsed valve for injecting said sample fluid into said chamber, said pulsed valve having a pulse duration; and a capacitor carried within said chamber for ionizing at least a portion of said sample fluid, said capacitor having a time constant greater than said pulse duration, said sample fluid activating said capacitor when said sample fluid is proximate to said capacitor.