INFICON HAPSITE Smart Plus Chemical Identification System - Manual (Page 237)

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HAPSITE Smart Plus Operating Manual
6.2.1 Building a Survey Method Library File
Survey methods can be designed for data collection in three manners:
 without identification.
 qualitative analysis and identification based on match with the AMDIS library.
 Quantitative/Qualitative analysis, identification and quantification from a target
library and unknown identification using the AMDIS library.
In Survey, the GC does not separate VOC’s. Therefore, the process of building a
Survey method is best accomplished by preparing and running individual
standards for the target compounds at the desired concentration levels. Survey
methods can be calibrated at a single level or over a concentration range. The
accuracy of a Survey method is limited by the manner in which the data is collected
and the external calibration technique. Survey method target libraries can be built
by running multiple compounds in a single run. However, the user must edit the
combined spectrum, and select the appropriate mass fragments for each
compound. Compounds that share mass fragments cannot be run in the same
standard.
6.2.1.1 Creating Survey Methods for Target Compounds
Collection of Survey data is controlled by the method. Survey methods, like
Analyze (GC/MS) methods, are generated or modified using the Method Editor.
The Method Editor is covered in detail in
Chapter 11, Method Editor .
6.2.1.2 Building a Survey Target Compound Library
The library is built using the Calibrate Function. Calibrate is described in detail in
Chapter 12, Target Compound Methods . The special features of building a Target
compound Method for Survey are detailed in the following example.
Calibration samples must be collected prior to building the library. When collecting
the calibration runs, enter the concentration of the calibration standard and the
units in the Data File Info Header. The Data File Info Header is accessed by
selecting the Data File Info button from the toolbar in the Data Review Window. See
section 9.3, Data Review Toolbar, on page 9-5 . See Figure 6-2 .
. . . . . . . . . . . . . . . . . . . . . . . . Access Data File Info icon.