6 Operating in CI Mode
To Verify PCI Performance
5977B Series MSD Operating Manual 163
To Verify PCI Performance
Materials needed
• Benzophenone, 100 pg/L 5 × 1 mL (8500-5440)
Procedure
1 Verify that the MSD performs correctly in EI mode.
2 Verify that the PCICH4.U tune file is loaded.
3 Select Gas A and set flow to 20%.
4 In Tune and Vacuum Control view, perform CI setup. (See “To Perform a PCI
Autotune (Methane Only)” on page 159.)
5 Run CI Autotune. (See “CI Autotune” on page 145.)
6 Run the PCI sensitivity method BENZ_PCI.M using 1 µL of 100 pg/µL
benzophenone.
7 Verify that the system conforms to the published sensitivity specification.
Please refer to the Agilent Web site at www.agilent.com/chem for
specifications.
Always verify MSD performance in EI before switching to CI operation. (See
“To Verify EI System Performance” on page 131.) Always set up the CI MSD in
PCI first, even if you are going to run NCI.
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