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IPN 074-397-P1G
HAPSITE Smart Operating Manual
Monitoring (SIM) or Full Scan MS modes. The sensitivity of a GC/MS Loop method
(full scan) will be in the approximate range of high ppb to low ppm. The sensitivity
of a GC/MS concentrator method (full scan) will be in the range from high ppt to low
ppb. By comparison, a SIM method will always give slightly improved sensitivity
over a GC Loop or concentrator method as these methods focus on a limited set
of masses for detection. The sensitivity is related to the compound and sampling
system; the above are general guidelines.
All unknown samples should first be collected with the
Survey Method to avoid saturating the GC. The Survey
Method allows the tester to gain knowledge of how far
away to hold the probe from the sample and if a
concentrator needs to be used.
The sampling procedure for a GC/MS method is dependent on the HAPSITE
configuration:
Sample Loop. . . . . . . . . . . . . . . . . . Refer to section 3.4, GC/MS Mode with Loop,
on page 3-23 and section 5.3, GC/MS Mode
with Loop, on page 5-13 for additional
information on running methods with the
Sample Loop.
Concentrator Tube . . . . . . . . . . . . . Refer to section 3.5, GC/MS Mode with
Tri-Bed Concentrator, on page 3-28 through
section 3.6, GC/MS Mode with Tenax
Concentrator, on page 3-33 and section 5.4,
GC/MS Mode with Tri-Bed Concentrator, on
page 5-18 through section 5.5, GC/MS Mode
with Tenax Concentrator, on page 5-25 for
methods using concentrator tubes.
Headspace Sampling System . . . . Refer to section 3.7, GC/MS Mode with
Headspace Sampling System and Sample
Loop in Portable Mode, on page 3-36
through section 3.8, GC/MS Mode with
Headspace Sampling System and
Concentrator in Portable Mode, on page 3-40
and section 5.6, GC/MS Mode with
Headspace Sampling System and Sample
Loop Installed, on page 5-32 through section
5.7, GC/MS Mode with Headspace Sampling
System and Concentrator, on page 5-36 for
methods using the HSS.
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