4-15
Ver.1.36
From the menu bar, select “Tools” – “Analytical Modes” – “Hear-Cut EGA Analysis” or click on the icon
for “Heart-Cut EGA Analysis (A) on the toolbar. The set-up screen shown in Fig. 4.18 is displayed.
(1) Check the checkboxes for Furnace and Interface (B) to turn on heaters.
(2) Type in the parameters for a heating program in the table marked by C, in the same manner as
described for Direct EGA analysis.
(3) Determine the end time of each thermal zone using the EGA curve in Fig. 4.17. Enter these
times (min) in the table marked as D. When using a mass spectrometer as a detector, the elution
temperatures of the target components can be easily determined by using extracted ion
chromatograms of the target compounds. The number entered in Final (min) of each zone is
automatically entered as the Initial (min) of the next zone. The Initial time of Zone A starts from
0.0 min (fixed). Temperatures of the Initial (°C) and Final (°C) are automatically calculated and
displayed.
(4) The Selective Sampler and MicroJet Cryo-Trap are automatically controlled by the software.
“Click” on the “Settings” button (E) to display the accessory devices set-up screen. Then check
the checkboxes for desired devices.
(5) Whether a zone is analyzed or vented and whether or not auto cryo trapping is used are all set
through using the checkboxes for desired functions (F).
(6) The button marked by G allows you to switch zone displays between A through D and E through
H.
(7) Place a sample in a sample cup and attach it to the sampler; attach the sampler to the pyrolyzer.
Wait 2 minutes to purge air in the dead space.
(8) Click “START” button.
(9) When the GC, furnace, interface, Selective Sampler, and MicroJet Cryo-Trap are ready, the
dialog box in Fig. 4.19 will be displayed. Push the Double-Shot sampler down to position the
sample cup in the furnace. Click the “Start” button or hit the “ENTER” key on the PC keyboard.
Fig. 4.19 Starting dialog box for Heart-Cut EGA Analysis
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