Chapter 11 method editor, 1 the method editor, Chapter 11 – INFICON HAPSITE Smart Plus Chemical Identification System User Manual
Page 361: Chapter 11, method editor
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HAPSITE Smart Plus Operating Manual
Chapter 11
Method Editor
11.1 The Method Editor
WARNING
Only trained users should create methods. Selecting a
parameter that is incorrect may provide an inaccurate
analysis of the compound(s) sampled.
The HAPSITE Method File provides for the identification, quantitative, and
qualitative analysis of volatile compounds in the sample. The main components
covered in this section, which are used to build the HAPSITE Method File, are the
Inlet component, which is built on the Inlet page, the Acquisition component, which
is built on the Full Scan page, and the Calibration/Quantitation component, which
is built on the Search page.
When completed, the HAPSITE Method File normally is saved to the HAPSITE so
that the HAPSITE can run in Portable Mode, without the need for an external
computer. This chapter will instruct how to build a method to quantify a VOC
(Volatile Organic Compound).
The Method File is used at an incident site where the hazard has not been
identified. A HAPSITE Method File will allow a search from a default range of 45 to
300 AMU and generate a data file for analysis. The file will include many target
compounds, for which the HAPSITE can be calibrated, but may also include
unexpected compounds. The unexpected compounds are tentatively identified by
a NIST library search, allowing only for an approximate quantitation.
Before being able to quantify a compound, one must develop a HAPSITE Method
File with a calibrated target library of selected compounds. The information needed
for each component of the HAPSITE Method File is described on the following
pages:
The Description page, which specifies the type of Method being built.
The Startup page, where all initial temperatures are set, and where the input
device is selected (i.e., Probe, Headspace or SituProbe).
The Inlet page, defines the temperatures, timing, and other gas chromatograph
parameters as well as accessory control parameters if installed.
The Tune page requires the selection of a Tune/Calibration file, which defines
the mass spectrometer response parameters. The tune report can be displayed
on this page and on the Tune page.