Frontier EGA/PY-3030D, Руководство по эксплуатации

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4-12
Ver.1.36
4.3.3 Set-up for Direct EGA Analysis and operation procedure
In this analysis mode, an EGA capillary tube (part No.: UADTM-2.5N), is used to connect the GC
injector to the detector. Also, the GC oven temperature is set between 250 and 300°C (isothermal)
From the menu bar, select
“Tools” – “Analytical Modes” - “Direct EGA Analysis”, or click on the icon
for Direct EGA Analysis (A) on the toolbar. The set-up screen shown in Fig. 4.14 is displayed.
(1) Check the checkboxes for Furnace and Interface (B) to turn on the heaters.
(2) Enter parameters for Step 1 in D through H.
(3) Type in parameters for Step 2. Entering
“0” for Rate (°C/min) in subsequent rows will stop
executions of the steps beyond. Fig. 4.15 illustrates a schematic diagram for a 4-step heating
sequence. In direct EGA analysis, a one-step sequence (step 1 only) is normally used.
(4) When the sequence is automated using the Selective Sampler, click on
“Settings” (C) to open a
dialog box and check the checkbox for SS.
A.
B.
D. Initial temp.
E. Hold time at initial temp. F. Ramp rate G. Final temp.
C.
H. Hold time at final temp.
Fig. 4.14 Set-up screen of Direct EGA Analysis
300