Title:
【発明の名称】キャリヤ-ガス中のサンプル分子の検出方法と装置
Document Type and Number:
Japanese Patent JP2807201
Kind Code:
B2
Abstract:
In order to improve a process for detecting sample molecules in a carrier gas, wherein a divergent stream of carrier gas is generated by means of expansion of the carrier gas through a nozzle into a vacuum, the sample molecules are ionized selectively to form sample molecule ions in an ionization zone of the stream of carrier gas by absorption of photons and the sample molecule ions are drawn by an electrical pulling field into a mass spectrometer, such that the sensitivity of the process is distinctly increased without forfeiting selectivity, it is suggested that a continuum zone of the stream of carrier gas, in which the temperature of the carrier gas decreases with increasing distance from an exit aperture of the nozzle, a molecular beam zone of the stream of carrier gas, in which the temperature of the carrier gas does not essentially decrease any further with increasing distance from the exit aperture of the nozzle, and a boundary between the continuum zone and the molecular beam zone be determined and that the sample molecules be ionized in an ionization zone near to the boundary between the continuum zone and the molecular beam zone.
Inventors:
HORUSUTOOHENNINKU GUROTEERU
HARARUDO OOZAARU
RAINHORUTO TANNAA
HARARUDO OOZAARU
RAINHORUTO TANNAA
Application Number:
JP30593995A
Publication Date:
October 08, 1998
Filing Date:
November 24, 1995
Export Citation:
Assignee:
DOITSUCHE FUORUSHUNKUSANSHUTARUTO FUYURU RUFUTO UNTO RAUMUFUAARUTO EE FUAU
International Classes:
G01N27/62; H01J49/10; H01J49/26; H01J49/16; H01J49/40; (IPC1-7): H01J49/10; G01N27/62; H01J49/26
Domestic Patent References:
| JP58157043A | ||||
| JP61200663A |
Attorney, Agent or Firm:
Takashi Ishida (3 others)