Chemistry

Sample application techniques in gas chromatography

Sample application techniques in gas chromatography


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Dosing loops - sample application in the GC via multi-way valves

In gas chromatography, metering loops are used analogous to those in HPLC. They are particularly necessary for metering gases, but are also used for liquid samples. The solid volumes are filled into the loop in the unpressurized state and then introduced into the carrier gas flow by switching.

Advantage:

  • very reproducible volume
  • easy to automate
  • particularly suitable for on-line analysis and process control


Video: Sample Preparation in gas chromatography (May 2022).