3 Installing Intuvo 9000 GC Column
Columns
50 7000/7010 Series TQ GC/MS Operating Manual
Columns
Many types of Intuvo 9000 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 temperature, requiring
measurements of the actual flow to be taken. Use Table 4 to determine an
acceptable column flow and also refer to Table 7, “Influence of carrier and CC
gas flows on ion vacuum gauge readings,” on page 106.
Table 4 Gas flows
Feature Gas flows
High-vacuum pump Split flow turbo
Optimal He column gas flow, mL/min (carrier gas) 1 to 2
CC gas flow 3 to 4
Maximum recommended gas flow, mL/min
*
* Total gas flow into the MS = column flow + CC gas flow + JetClean H
2
flow (if applicable)
4 to 6
Maximum gas flow, mL/min
†
† Expect degradation of spectral performance and sensitivity
6.5
Maximum column id 0.53 mm (30 m length)
JetClean option H
2
flow 0.4 mL/min
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