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3.
On the Inlets tab, set the Inlet Parameters (°C) as follows:
Inlet Parameter (°C) Value
Capillary Line 1
Capillary Line 2
Re-entrant
Septum
Probe
4.
On the Control 2 tab, set Detector (V) to 200.
5.
On the EI+ Source tab, set the following parameters:
Parameter
Electron Energy (eV) 70
Trap (µA)
To prepare the sample
To avoid contaminating the sample, after flame-cleaning,
Caution:
keep the sample cups free of grease (from fingers or laboratory
surfaces) and handle them with tweezers.
1.
Flame three Type D sample cups to red heat and allow to cool.
2.
Prepare a methyl stearate solution of 200 pg/µl in hexane.
3.
Place 1 µl of solution in each cup and allow the solvent to evaporate.
To tune the instrument
1.
Tune the instrument as described in
page
2-1.
2.
When the low resolution tuning is complete, save the Tune window
parameters to a new instrument parameter file having an appropriate
file name, for example, AutoSpec_EI_sensitivity.ipr.
50
50
0
180
30
Value
1000
"Low resolution tuning" on
Measuring EI sensitivity from the solids probe
7-83
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Table of Contents
Troubleshooting
