Axis BTA 2100D Manuel de l'opérateur Page 181

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179
Item Description
MS q Calculator Use the q Calculator for suggested
excitation storage levels.
Desired Product Mass Enter product mass expected from
dissociation.
Desired q Value Empirically observed “q” value of 0.4
provides an optimum yield of product
ions.
Customize Non-resonant Method
Item Description
Ionization Storage
Level
The m/z value the rf is maintained during ionization and
the coarse isolation. Range 35 to 160 m/z (upper limit of
range depends on parent ion m/z), default = 48 m/z.
Ejection Amplitude Amplitude (v) of the ejection waveform during the coarse
isolation step. Range 0 to 60 volts, default=20.
Low Edge Offset Integer value step to optimize the ejection of the mass
just below the parent ion mass. Range is 0 to 20 steps.
The default value is 6.
High Edge Offset The integer value step to optimize the ejection of the
mass just above the parent ion mass. Range is -20 to 20
steps.
High Edge Amplitude Amplitude of broadband waveform use to eject masses
above the isolated parent ion. Default is 30 volts.
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