CI Maintenance 6
5975 Series MSD Operation Manual for MassHunter 161
To Set Up Your MSD for CI Operation
Setting up your MSD for operation in CI mode requires special care to avoid
contamination and air leaks.
Guidelines
• Before venting in EI mode, verify that the GC/MSD system is performing
correctly. See “To Verify System Performance” on page 79.
• Make sure the reagent gas inlet line(s) are equipped with gas purifiers (not
applicable for ammonia).
• Use extra-high purity reagent gases; 99.99% or better for methane and as
pure as is available for other reagent gases.
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