| 摘要 |
<p>When a specimen from a specimen ionizing unit (ion source) is introduced, the specimen, if not sufficiently ionized, is caused to remain in sites other than a pore in an introducing section and then deposited as a product such as an oxide or carbide by an energy such as heat. The deposited deposit causes a deterioration in the performance of the mass spectrometry device. The present invention has a specimen supply source, a specimen ionizing section for ionizing a specimen supplied from the specimen supply source, a specimen-introduction regulating chamber into which ions of the ionized specimen are introduced, a differential evacuation chamber located at the downstream side of the specimen-introduction regulating chamber, and an analyzing section located at the downstream side of the differential evacuation chamber, in which a discharge generating means is formed for generating an electric discharge inside at least one of the specimen-introduction regulating chamber and the differential evacuation chamber. The discharge generating means has a specimen introducing section electrode and a first-pore-section-forming member (electrode) located oppositely to each other inside the specimen-introduction regulating chamber, or a first-pore-section-forming member (electrode) and a second-pore-section-forming member (electrode) located oppositely to each other inside the differential evacuation chamber.</p> |
