Installation 2
Hardware Installation 43
Familiarizing the Customer
Follow the “Customer Familiarization Checklist” on page 53.
Important points about the CI MSD to cover include:
❒ Cleanliness is the most important factor for success in CI, especially
negative mode. This includes air leaks, water, and residual PFDTD
calibrant.
❒ NCI reagent gas setup:
There are no negative reagent ions formed. To set up for NCI mode, tune in
PCI mode, then load NCI tune file to switch parameters, set gas flow to 40%;
adjust if necessary for specific analyte.
❒ NCI operation:
Reagent gas flow, source temperature, and emission current are the three
most important parameters for optimizing NCI.
❒ No PFDTD calibrant ions are formed in PCI with isobutane or ammonia.
Tune with methane, and copy parameters to new file: for example,
PCINH3.U.
❒ The gas purifier can not be used with ammonia.
❒ Must ballast foreline pump daily if running ammonia. Refer to the
maintenance chapter of the 5975 Series MSD Hardware Manual.
❒ For updated information, see the Agilent Technologies Web site at
http://www.agilent.com/chem.
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