Agilent Technologies 7000 Series User Manual

2 Installing 8890 GC Columns
Columns
30 7000/7010 Series TQ GC/MS Operating Manual
Columns
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, requiring
measurements of the actual flow to be taken. Use the flow calculator in the
Agilent Instrument Utilities software, and Table 3 to determine an acceptable
column flow. EI and CI systems also have different column outlet flow pressures.
(See Table 7 on page 106 for EI mode and Table 10 on page 132 for CI mode.)
Table 3 Gas flows
Feature Gas flows
High-vacuum pump Split flow turbo
Optimal He column gas flow, mL/min (carrier gas) 1 to 2
Reagent gas flow, mL/min 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 + reagent gas flow (if applicable) + 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

Agilent Technologies 7000 Series Specifications

General

Brand	Agilent Technologies
Model	7000 Series
Category	Industrial Equipment
Language	English