Injection of non-retained compounds GC

Discussions about GC and other "gas phase" separation techniques.

2 posts Page 1 of 1
Can anyone help me on how to inject a non-retained compound in a GC assignment. I also want to know which compounds are most appropriate . Thank you.
Non-retained will depend on what column you are using as some analytes are highly retained on one type of column and relatively unretained on another.

Also what detector are you using. What responds well to an FID may not respond to an ECD.

On a column made for organic molecules you could inject air, argon or nitrogen and it would be non-retained and respond well to an ECD detector if you are using hydrogen or helium carrier gas. But a column made for analyzing fixed gasses it would retain the above analytes.
The past is there to guide us into the future, not to dwell in.
2 posts Page 1 of 1

Who is online

In total there are 5 users online :: 0 registered, 0 hidden and 5 guests (based on users active over the past 5 minutes)
Most users ever online was 599 on Tue Sep 18, 2018 9:27 am

Users browsing this forum: No registered users and 5 guests

Latest Blog Posts from Separation Science

Separation Science offers free learning from the experts covering methods, applications, webinars, eSeminars, videos, tutorials for users of liquid chromatography, gas chromatography, mass spectrometry, sample preparation and related analytical techniques.

Subscribe to our eNewsletter with daily, weekly or monthly updates: Food, Environmental, (Bio)Pharmaceutical, Bioclinical, Liquid Chromatography, Gas Chromatography and Mass Spectrometry.

Liquid Chromatography

Gas Chromatography

Mass Spectrometry