Ion trap mass spectrometer and ion trap mass spectrometry

Details Ion trap mass spectrometer and ion trap mass spectrometry Ion trap mass spectrometer and ion trap mass spectrometry

1998-04-16

1999-11-30

Westin, Edward P.

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

250282, B01D 5944, H01J 4900

Patent

active

059946970

ABSTRACT:
In the operation of a ion trap mass spectrometer, a high temperature gas at about 300.degree. C. is introduced as a buffer gas. As a result, water molecules absorbed on the inner wall of the quadrupole electrodes of the ion trap mass spectrometer are desorbed and evacuated. Further, the quadrupole electrodes themselves and vacuum chamber are also heated. As the high temperature gas is introduced into the ion trap space, the time necessary for evacuating the ion trap space is shortened and the noise during the measurement time is effectively reduced. During the measurement time, the temperature is controlled to be low, and the thermal degradation of the sample is prevented.

REFERENCES:
patent: 2939952 (1960-06-01), Paul et al.
patent: 4540884 (1985-09-01), Stafford et al.
patent: 5796100 (1998-08-01), Palermo
"Recent Improvements in and Analytical Applications of Advanced Ion Trap Techology" by G.C. Stafford, Jr., et al., International Journal of Mass Spectrometry and Ion Processes, 60 (1984), pp. 85-98; Elsevier Science Publishers B.V., Amsterdam--Printed in The Netherlands.

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