
Chapter 5 Optimizing Instrument Settings
5-78 PerSeptive Biosystems
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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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