Inlet Systems
Packed column inlet
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| Packed Column | ||
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| Internal |
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Carrier |
| Electronic | ||||||||||||||||
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| Detector | ||||||||||||||||
| Flow | Flow Sensor |
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Gas |
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| Controller | (optional) |
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Column
Flow Diagram, Packed Column Inlet (with electronic flow sensor)
Liquid sample is rapidly volatilized inside the inlet. To ensure complete volatilization, inlet temperature typically should be at least 20^C greater than the highest oven temperature to be used.
Assuming column and liner (plus insert, if used) are properly installed and the system is leak•free,the following is information necessary for proper operation.
Electronic flow sensor
If Electronic Flow Sensing (EFS) is installed in the carrier gas system to the inlet, total supply flow rate through the system may be displayed (see Chapter 4, Electronic Flow Sensing, for details). This is particularly convenient in situations when carrier flow must be turned off (as when changing gas supplies, or if supplies must be turned off nightly, weekends, etc.).
Note: The EFS requires at least one hour for thermal equilibration for reliable readings.
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