Ultra-sensitive spectrometer for making mass and elemental analy

Details Ultra-sensitive spectrometer for making mass and elemental analy Ultra-sensitive spectrometer for making mass and elemental analy

1976-03-01

1977-07-19

Smith, Alfred E.

Radiant energy

Ionic separation or analysis

250282, 250398, 328233, B01D 5944, G01K 108, H01J 2300

Patent

active

040371000

ABSTRACT:
The present invention comprehends an extremely sensitive apparatus which can be used for the detection of electronegative particles and provide data as to their elemental composition. A mass spectrometer selects negative ions of the required mass coming from an ion source. These ions are then directed into a dissociator which fragments complex molecules and strips electrons from the resulting products producing positively charged ions. These positively charged ions are filtered by a series of elements which independently measure some combination of the quantities: energy/charge, energy, momentum/charge, velocity, charge. Such measurement allows the actual mass of each particle to be uniquely defined and, if necessary, over-determined for reduction of backgrounds.

REFERENCES:
patent: 3786359 (1974-01-01), King

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