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Chapter 5 Optimizing Instrument Settings
5-78 PerSeptive Biosystems
5
A lower Accelerating Voltage setting does the following:
Provides more data points across a peak for better peak
definition when analyzing low mass ions (Linear mode
only).
Improves resolution when analyzing compounds below
2,000 Da, and the resolution is limited by the digitization
rate of the system (Reflector mode).
5.4.4.3 Setting Guide Wire Voltage%
To optimize sensitivity, you can adjust the Guide Wire
Voltage%:
Linear mode—Increase in increments of 0.05 percent
until you see signal-to-noise ratio start to decrease.
Reflector mode—Increase in increments of
0.01 percent. Settings above 0.05 percent do not typically
improve signal-to-noise ratio.
NOTE: In Reflector mode, Guide Wire Voltage% also affects
mass resolution. To fine tune signal-to-noise ratio and
resolution at the same time, adjust the Guide Wire Voltage%
in increments smaller than 0.01 percent.
For more
information
For more information, see:
Section 5.4.3.3, Optimizing Guide Wire Voltage%
Section 5.3.4, Understanding Guide Wire Voltage%
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