Agilent Technologies 5975T LTM GC Operation Manual page 74

3
Operating in Electron Impact (EI) Mode
The MSD can be used to measure actual column flow. You inject a small
amount of air or other unretained chemical and time how long it takes to
reach the MSD. With this time measurement, you can calculate the column
flow. See
74
page 87.
5975T LTM GC/MSD Operation Manual