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[ Thermal Desorption | Index] Zoom: [PDF icon Printable PDF]
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Pages in this section: C6 C7 C8 C9 C10 C11
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AutoDesorb
™
C10
Scientific Instrument Services, Inc.
™
Phone: 908-788-5550
www.sisweb.com/catalog/08/C10
T
he AutoDesorb software is fully integrated with the Agilent
ChemStation
™
software. The entire GC or GC/MS
process as well as the desorption process is started from
the ChemStation windows. The Agilent ChemStation windows are
used for the GC and MS operation as well as sample information
and the AutoDesorb windows are used for thermal desorption
method setup and for monitoring sample analysis. Thermal
Desorption Methods and Operation Methods are developed in the
AutoDesorb windows and saved into the Agilent ChemStation
Method. Methods can be changed between subsequent samples to
provide different desorption parameters for different samples or the
same method can be used for all samples.
The AutoDesorb™ software is designed to be graphical and
easy to use. Sample information need only be entered once. All
data such as sample name and vial number are entered into the
Agilent ChemStation sample run window or the sequence run
window.
The AutoDesorb software system provides for the visualization
and control of all the thermal desorption operations including
sample purging and injecting times, desorption temperatures and
times, GC start times and Cryo-Trap
™
heating and cooling parame-
ters. A user-friendly Graphical Interface displays the pictorial as
well as digital status of the thermal desorption system operation
and GC Cryo-Trap operation. Changes made to the thermal
desorption methods can be saved to the Agilent ChemStation
Method. All the AutoDesorb setup and operational parameters are
displayed on 4 graphics Windows screens. Other screens enable
system setup and setting of system limits.
The first of these windows is the AutoDesorb™ Status Window
(Figure 1) which displays graphically and digitally the current status
of the AutoDesorb™ system. The graphic display visually
demonstrates the mechanical operation of the AutoDesorb™
system as it occurs. The digital display also lists the current thermal
desorption system conditions including sample name and vial
number, desorption and cryo-trap temperatures, GC inlet pressure
and the GC valve status.
The second screen is the Temperature Settings Screen (Figure
2). Method setup is done here as well as monitoring the current
status of the thermal desorption block heaters and cryo-trap
temperatures. Up to 3 temperature ramps and hold times for the
desorption block heaters are permitted in the method. Both the
heating and cooling temperatures for the Cryo-Trap are also
entered here. The user entered method can then be saved to the
Agilent ChemStation method file and used for the analysis of sub-
sequent samples. The graphics display visually shows the temper-
ature profiles for the thermal desorption blocks and the cryo-trap on
a time scale during the analysis in real time.
The third screen is the Time Settings Screen (Figure 3).
Method setup is done here as well monitoring the current status of
Purge Gas Time, Injection Time, Desorption Time, Cryo-Trap cool
and heat times and the GC Start Run Time. On the bottom section
of this window are entered the times for the various thermal
desorption and Cryo-Trap processes. The GC start time can be at
set at anytime from the time of injection until after the desorption
process is complete. The graphic display shows the relative times
of each of these events. During the actual desorption process, a
time bar shows the actual time position of the thermal desorption
process
Additional windows include the sample log window for
displaying the sample analysis history and System Limits screen for
entering the maximum conditions of the AutoDesorb™ system.
Figure 3 - AutoDesorb™ Time Settings Window
AutoDesorb PC Software Control
Figure 1 - AutoDesorb Status Window
Figure 2 - AutoDesorb Temperature Settings Window
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