INFICON HAPSITE Smart Plus Chemical Identification System - Manual (Page 366)

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HAPSITE Smart Plus Operating Manual
Mode of Analysis
Analyze (GC/MS) . . . . . . . . . . . . . . This analysis uses both the Gas
Chromatograph (GC) and Mass
Spectrometer (MS) to separate and analyze
compounds. Compounds are tentatively
identified by a library search.
Survey . . . . . . . . . . . . . . . . . . . . . . . This mode uses only the Mass Spectrometer
and provides an immediate response and
approximate quantitation. Samples flow
directly to the Mass Spectrometer with no
separation of compounds by the GC.
Collection Mode
Full Scan . . . . . . . . . . . . . . . . . . . . . This mode scans all the masses across a
given range. This is used for general analysis
of samples when several compounds are to
be quantified or when attempting to identify
unknowns. Full Scan is available for both
Analyze (GC/MS) and Survey modes of
analysis.
SIM. . . . . . . . . . . . . . . . . . . . . . . . . . Selected Ion Monitoring, this mode is used
for specific target compounds expected to be
in the sample. A higher degree of sensitivity
is provided with this mode of collection. SIM
is available for both Analyze (GC/MS) and
Survey modes of analysis. Survey analysis in
SIM Mode can be used for leak detection.
WARNING
Collection modes must be carefully selected to be sure
all the compounds are identified.
11.3.1 Full Scan Method
A full scan Analyze (GC/MS) method is used for the full identification and
quantitation of volatile compounds in the sample.
The analysis may include expected (or target) compounds (for which the
instrument will be calibrated), but may also include unexpected compounds. These
must be tentatively identified by a library search, and their quantitation can only be
approximated.