INFICON HAPSITE ER Chemical Identification System User Manual

Page 533

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N 07

HAPSITE ER Operating Manual

Elution time. . . . . . . . . . . . . . . . . . . The time from injection of a specific

compound onto the GC until the compound
appears at the exit (same as Retention
Time).

Equilibrium Time . . . . . . . . . . . . . . The time allowed for a solid or liquid to heat

and equilibrate volatile compounds between
the sample and associated headspace within
a sample vial.

ET. . . . . . . . . . . . . . . . . . . . . . . . . . . Elapsed time of sample run. Used for MS

scanning.

Extra Measurements . . . . . . . . . . . These determine the number of times the

mass spectrometer will scan a mass in SIM
analysis before scanning the next mass.
Extra measurements effectively increase the
response to a mass but also increases the
scan time.

Filament. . . . . . . . . . . . . . . . . . . . . . A hot wire in the ionizer from which electrons

are emitted.

Filament Delay . . . . . . . . . . . . . . . . This specifies the amount of time between

the start of analysis and the time which the
HAPSITE turns on the filament. Filament
delay is a filament preserving measure which
allows components of the air peak or
solvents to pass through the mass
spectrometer before the filament is turned
on.

Fit . . . . . . . . . . . . . . . . . . . . . . . . . . . A description of how well a reference

spectrum matches an acquired spectrum in
location and intensity of peaks.

Flow Pressure. . . . . . . . . . . . . . . . . This setting controls the flow rate of Nitrogen

through the HSS during the Sample and
Purge states.

Flush . . . . . . . . . . . . . . . . . . . . . . . . A Headspace Sampling System function

which is used to clean out the HSS by
heating the sample block and transfer line to
80 °C while pushing clean nitrogen through
the system (but not into the HAPSITE). Flush
is initiated by disconnecting the transfer line
from the HAPSITE and pressing the flush
switch inside the front door of the HSS.