Hello,
As you can see in the figure, restrictors are on the way of carrier gas or some time sample gas. Why do we use the restrictors in gas chromatograph systems?
what is the role of this part?
It provides a pressure drop. For example you can select a restrictor with pressure drop equal to your column. Thus the pressure set for carrier gas will provide same flowrate by the column and restrictor.
Regards
G
Second option measuring the pressure drop on the restrictor alows to determine the flowrate
The restrictor presents in GC specially designed for minimizing the amount of air (oxygen) and moisture which cause interface when the GC column is removed. With a restriction connector installed, the pressure drop across the 0.100μm transfer line makes it necessary to increase the head pressure to obtain retention times equal to those you obtained without the connector. The higher head-pressures used with restriction connectors might change injection port characteristics.
- Badges
- Science topic
- Similar topics
- Engineering
- Petroleum Engineering
- Gas