Ion detection methods, mass spectrometry analysis methods,...

Details Ion detection methods, mass spectrometry analysis methods,... Ion detection methods, mass spectrometry analysis methods,...

2004-09-03

2009-08-18

Wells, Nikita (Department: 2881)

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

C250S281000, C250S282000, C250S283000, C250S397000

Reexamination Certificate

active

07576324

ABSTRACT:
Ion detection methods are provided that can include applying a first voltage between a power source and a dynode, and contacting the dynode with first ions to create a first charged species. After applying the first voltage, a second voltage can be applied between the power source and the dynode, and the dynode can be contacted with second ions to create a second charged species. Mass spectrometry instrument circuitry is also provided that can include a power source coupled to a dynode via at least one switch with the switch being operatively configured in one position to apply a first voltage between the dynode and the power source, and, in another position, configured to apply a second voltage between the dynode and the power source. Mass spectrometry analysis methods are also provided that can include detecting sorted ions using a dynode configured according to an ion detection parameter with the ion detection parameter including first and second dynode values associated with first and second time values. Methods and circuitry for portable instrumentation are also provided.

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International Search Report (PCT/US04/29127, filed Sep. 3, 2004).
Written Opinion of International Searching Authority (PCT/US04/29127, filed Sep. 3, 2004).

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