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4
Operation
An Example
Assume we have a method that uses an HP-5MS column (30 m × 250 µm
id × 0.25-µm film thickness) to measure pesticides with an MSD performance
turbo system. The initial oven temperature is 70 °C and is programmed to
280
pressure and the carrier gas is helium. The initial column flow listed by the
ChemStation is 2.1 mL/min.
We want to create a new splitter method with the column effluent split 1:1:0.1
between the MSD (detector 1), an FPD (detector 2), and an ECD (detector 3).
We would also like to preserve the retention times and relative elution order in
the new method.
Column flow
Since the column outlet pressure will be much higher in the new method, the
first step is to calculate the new inlet pressure and the resulting column flow.
The Method Translation software
mode and check the button to make the hold-up times the same.
40
ο
C. The method runs in constant pressure mode at 19.44 psig inlet
17) is useful for this. Use the None
(Figure
Installation and Operation Guide
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