Agilent Technologies 5977B Series Operating Manual page 126

5 Operating in CI Mode
• Ion polarity: Always set up in PCI with methane first, then switch to your
• Abundance target: Adjust higher or lower to get the desired signal
• Peakwidth target: Higher peakwidth values give better sensitivity, lower
• Maximum emission: current Optimum emission current maximum for NCI
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desired ion polarity and reagent gas.
abundance. Higher signal abundance also gives higher noise abundance.
This is adjusted for data acquisition by setting the EMV in the method.
values give better resolution.
is very compound-specific and must be selected empirically. Optimum
emission current for pesticides, for example, may be about 200 µA.
5977B Series MSD Operating Manual
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