LC and GC columns

[offroad]

dear friends,

why is a LC column length so short compared to a GC's?

thank you

[tom jupille]

The short, oversimplified answer is because liquids are four orders of magnitude denser than gases, and diffusivity in liquids is four orders of magnitude lower.

[offroad]

The short, oversimplified answer is because liquids are four orders of magnitude denser than gases, and diffusivity in liquids is four orders of magnitude lower.

Could you kindly get me a link or something with more information?

Thank you.

[tom jupille]

It's math-intensive, but the classic is Giddings' book "Dynamics of Chromatography"

You can pick up used copies relatively inexpensively (in the US, at least). Here's the link to Amazon:
http://www.amazon.com/s?ie=UTF8&tag=moz ... lla-search

[offroad]

wonderful info.

Thank you so much.