Inlet Systems
Packed column inlet
Figure
Injection Port Setpoint
Bottom of Sep-Temperature 350^C
tum10
20 |
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30 |
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40 |
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Syringe Tip |
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50 |
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60 |
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70 |
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80 |
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90 |
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| 35^ |
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| 150^C |
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| 300^ |
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Base of Injection |
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| C |
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Port |
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Ove |
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| Oven |
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50 | n | 150 | 200 | 250 | 300 | 350 | 400 | |||||||||||
100 | ||||||||||||||||||
Temperature in Gas Stream — ^C
Thermal Profiles
This optimized thermal profile allows very reproducible results and virtually eliminates injection port discrimination against high boiling point components. When combined with fast automated injection, excellent quantitative accuracy is possible.
Septum purge
Best results are obtained by running a very low septum purge flow (1 to
2 ml/min. of purge flow is recommended•never more than 10% of column flow rate). Once the purge flow has been set, it will remain constant, regardless of changes in column head pressure or column flow rate. An alternate septum nut is provided which allows operation without purge flow if desired.
105