Chromatography Forum

Posted: **Mon May 07, 2007 3:16 am**

Dear all
I want to measure H2-O2-N2-CH4-CO-CO2 in pure H4SI(monosilane) and I would like to know which column(or configuration) is the best to use as pre column for the separation of the air from H4SI.
The second column can be a Molecular sieve 5A for H2-O2-N2-CH4-CO and a porapak for CO2. A ShinCarbon can also be used for all permanent gases and CO2.
My biggest concern is for the separation of H4SI from the air.
thanks

Posted: **Mon May 07, 2007 1:25 pm**

A Carboxen 1000 should separate the silane from air.

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

Posted: **Mon May 07, 2007 4:38 pm**

Dear Tiger,

Based on bp, silane should elute betwen methane and ethane.

If you used a long high loading methyl silicone column or a moderate length Carbopack B column you should be able to separate silane from air and CO readily.

best wishes,

Rod

Chromatography Forum

precolumn to use for separation of H4SI(monosilane) from air

precolumn to use for separation of H4SI(monosilane) from air