Columns - Agilent Technologies 7200 Operation Manual

2 Installing GC Columns

Columns

Columns

26
Many types of GC columns can be used with the MS, but there
are some restrictions.
During tuning or data acquisition the rate of column flow into
the MS should not exceed the maximum recommended flow.
Therefore, there are limits to column length and flow. Exceeding
recommended flow will result in degradation of mass spectral
and sensitivity performance.
Remember that column flows vary greatly with oven
temperature. See "To Calibrate the Column"
instructions on how to measure actual flow in your column. Use
the flow calculator in the Agilent Instrument Utilities software,
and Table 2 to determine an acceptable column flow. For
expected column outlet flow pressures, use the values shown in
Table 3 for EI mode and
Table 2 Gas flows
Feature
High-vacuum pump 1
High-vacuum pump 2
High-vacuum pump 3
Optimal carrier gas flow, mL/min
Reagent gas flow, mL/min
Collision cell gas flow
Maximum recommended gas flow, mL/min
Maximum gas flow, mL/min
Maximum column id
* Total gas flow into the MS = column flow + collision cell gas flow + reagent gas
flow (if applicable) + Agilent Quick Swap flow (if applicable)
† Expect degradation of spectral performance and sensitivity.
Table 6 for CI mode.
Split flow turbo
Split flow turbo
Turbo
1.0 to 1.5
1 to 2
1.5
*
2.0
†
2.4
0.32 mm (30 m length)
on page 58 for
Operation Manual