Chromatography Forum

Hi,
Let me know which column is the best for a good separation of Krypton and Nitrogen in Helium.
I use a Packed Mol. Sieve 5A 100/120 12' long and it works not so bad, but I would like to know if something better is available.

thank you

dany

if you have already the selectivity, in terms of resolution and efficiency you can use a PLOT (porous layer open tubular) Mol Sieve column.

philippe

Yes, Dany,

A 1-2 ft Supelco Carboxen 1000 1/8" packed column will work wonders.

A Supelco PLOT Carboxen 1006 will also work well but cost a lot more money.

Send me your email address and I can send you a chromatogram of a 2 ft column.

best wishes,

Rodney George
Senior Research and Development Scientist
Gas Separations Research
Supelco
595 North Harrison Road
Bellefonte, PA 16823

814-359-5737 voice
814-359-5459 fax
rodney.george@sial.com

Dany,

Here are the specifics:

The separation of nitrogen and krypton is achieved on a 2ft Carboxen 1000 60/80 mesh column that is only 2 ft in length at 40°C: neon 0.092 minutes, nitrogen 0.390 minutes, krypton 1.847 minutes.

I also have an application that separates hydrogen, oxygen, nitrogen, and krypton in less than two minutes.

best wishes,

Rodney George
Senior Research and Development Scientist
Gas Separations Research
Supelco
595 North Harrison Road
Bellefonte, PA 16823

814-359-5737 voice
814-359-5459 fax
rodney.george@sial.com