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Part 1. Electronic Pneumatic Control (EPC) Flow and Pressure Control
Enter the initial flow or pressure or average linear velocity
Table 8 Column Size and Carrier Gas Flow Rate
Carrier gas flow rate
Column type Column size Hydrogen Helium
Packed 1/8-inch 30
1/4-inch 60
Capillary 50 µm id 0.5 0.4
10 0 µm id 1.0 0.8
200 µm id 2.0 1.6
250 µm id 2.5 2.0
320 µm id 3.2 2.6
530 µm id 5.3 4.2
These flow rates, in mL/min at normal temperature and pressure (25°C and 1 atm)
are recommended for all column temperatures.
For capillary columns, flow rates are proportional to column diameter and are 20%
lower for helium than for hydrogen.
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