Patent Number: 7,465,920

Title: Ionization method and apparatus for mass analysis

Abstract: A laser spray method exhibiting a high detection sensitivity when applied to mass analysis has its sensitivity raised further. In a laser spray method of ionizing a liquid sample by irradiating, with a laser beam, the end of a capillary into which the sample has been introduced, use is made of an infrared laser as the laser beam, at least the end of the capillary is formed of a substance that does not readily absorb the laser beam used, and either the capillary is formed of a conductor and a high voltage is applied thereto, or the capillary is formed of an insulator, a conductive wire is placed inside a small cavity of the capillary and a high voltage is applied to the conductive wire.

Inventors: Hiraoka; Kenzo (Yamanashi, JP)

Assignee: University of Yamanashi

International Classification: H01J 49/10 (20060101)

Expiration Date: 2021-12-16 0:00:00