Thermo Scientific TSQ 8000, User Manual

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4
Creating a Method
Creating a MS Instrument Method
52 TSQ 8000 Evo User Guide Thermo Scientific
Figure 51. General Acquisition: Setting Temperatures and Acquisition Threshold
a. Set the MS Transfer Line Temperature . This field represents the temperature of the
transfer line, which is the tube that contains the column as it leaves the GC oven and
enters the TSQ 8000 Evo system. The maximum allowable temperature is 350 °C.
b. Set the Ion Source Temperature . You can enter a value between 0 and 350 °C. The
optimal temperature depends on the analyte. Higher temperatures will keep the ion
source cleaner, but will lead to increased fragmentation, which may reduce sensitivity.
c. (Optional) Select the Acquisition Threshold check box and enter a value for the
minimum peak height for the data file, if needed. If your peak has an intensity that is
below this threshold, it will not be stored. This setting may help reduce noise, but it
may also alter the reported isotope ratios because the smaller isotope signals will be
preferentially reduced.
Method Setup
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CAUTION
You will damage the column and contaminate the TSQ 8000 Evo
instrument if you set the transfer line temperature above the maximum allowed
temperature for the column.