Gas Chromatography

The Function of GC Inlets

This technical article covers the general function of GC inlets and describes some common attributes and differences whilst providing a context for future articles covering inlets in more detail.

A GC inlet is the interface through which sample is introduced into the GC column. Sometimes I hear people call inlets “injectors”. I think the word “injector” is better suited to something that actively injects sample into the inlet, like an automatic liquid sampler (ALS), or the dude in the lab coat holding the 10 µL syringe. With the many operational requirements placed on an inlet, it is to me amazing that they work as well as they do.

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