MS/MS type mass analyzer

Details MS/MS type mass analyzer MS/MS type mass analyzer

1995-02-21

1996-05-28

Anderson, Bruce C.

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

250281, H01J 4926, B01D 5944

Patent

active

055213820

ABSTRACT:
A common frequency source is used for the RF voltage generators of an MS/MS type mass analyzer composed of first, second and third main quadrupole units and two pre-rod quadrupole units provided for the first and third main quadrupole units. Since there arises no discrepancy in the frequency and phase of the RF electric field between the adjacent quadrupole units, the (parent as well as daughter) ions can pass through the quadrupole units smoothly and dispersion of the ions is minimized, which improves the sensitivity of the mass analyzer.

REFERENCES:
patent: 4234791 (1980-11-01), Enke et al.
patent: 4328420 (1982-05-01), French
patent: 4329582 (1982-05-01), French et al.
patent: 4731523 (1988-03-01), Kestal
patent: 5089703 (1992-02-01), Schoen et al.
patent: 5248875 (1993-09-01), Douglas et al.

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