Agilent Technologies G7035A Operation Manual page 100

4
Operating in Chemical Ionization (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.
5977 Series MSD Operation Manual