Patent ID: 7064323
Filing Date: 2006-06-20
Classification: F23J,H01J

Abstract:
1. A chemical substance detection apparatus, comprising: an ion trapping unit that traps, using any one of an electric field and a magnetic field, an ion group comprising ions of a chemical substance formed by ionization; an arbitrary waveform generation unit that generates a SWIFT waveform having a first voltage amplitude in a first frequency band corresponding to an orbital resonance frequency of a first impurity present in a concentration, a second voltage amplitude in a second frequency band corresponding to an orbital resonance frequency of a second impurity present in the concentration, and zero voltage amplitude in a third frequency band corresponding to an orbital resonance frequency of the chemical substance, wherein signal intensities corresponding to the first impurity and the second impurity are a predetermined signal intensity or larger, and wherein the first voltage amplitude is larger than the second voltage amplitude; and a mass analyzer that applies the SWIFT waveform generated in the arbitrary waveform generation unit to the ion group trapped by the ion trapping unit to remove the impurities, and then measures a mass of the chemical substance or a fragment thereof.