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HAPSITE ER Operating Manual
4.4 ANALYZE (GC/MS) Mode with the Concentrator
4.4.1 Tri-Bed Concentrator
The Tri-Bed concentrator is used for analyzing samples with concentration
levels in the low part per million to high part per trillion range. Two default
qualitative methods are ER_Tri-Bed_PPM_Standard and ER_Tri-Bed_PPB
Standard. Use the ER_Tri-Bed_PPM_Standard method when a response is
seen in Survey. If a compound is suspected, but Survey does not show an
increase in TIC (total ion count, which is a measure of response), use the
ER_Tri-Bed_PPB_Standard method.
The concentrator feature has increased sensitivity. Use
the appropriate method to avoid saturating HAPSITE ER.
4.4.2 Tenax Concentrator
This method is also used for analyzing samples with concentration levels in the low
part per million to high part per trillion range. The Tenax concentrator’s use is
similar to that of the Tri-Bed concentrator. However, the Tenax concentrator will not
effectively concentrate compounds with boiling points below 80
°C.
The Tenax concentrator will not effectively concentrate
compounds with boiling points below 80°C.
4.4.3 Procedure for Running Concentrator Methods
NOTE: Before an Analyze (GC/MS) concentrator method can be run, the
concentrator must be installed. Refer to section 3.3.7, Replacing the
Concentrator, on page 3-21 for instructions. Once installed, the
concentrator will be automatically cleaned before sampling begins.
1 Verify that the appropriate concentrator is installed.
2 The HAPSITE ER will automatically start preparing a concentrator method. If
HAPSITE ER does not prepare the desired concentrator method, refer to
section 4.2, Selecting a Different Method Using the SELECT METHOD Icon,
on page 4-13.
3 When the HAPSITE ER has finished preparing and the concentrator cleanout
is successful, a SYSTEM READY message will be displayed with a prompt to
press Survey or Analyze to begin sampling.
NOTE: A blank run is recommended before running a sample.
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