PPM N2 analysis in pure Krypton

[tigerk2001]

Dear sir,
I would like to know what would be the best columns and valve configuration to use for analysis of ppm N2 in pure Krypton.
I tried with a long Molecular Sieve 5A, but both peaks coelute together.

Thanks for your help.

[virtu]

http://books.google.ru/books?id=J4JY3uH ... q=&f=false

[chromatographer1]

You can see from the reference a capillary MS5A will not work for ppm analysis of N2 in Kr.

Call Supelco Tech Service and they can tell you how you can do the analysis with 3 feet of packed columns, a 12 inch and a 24 inch.

I don't work for Supelco but I did, and I told them how to do this analysis.

best wishes,

Rodney George
consultant

[tigerk2001]

Hi Rodney,
Could you please let me know what would be your suggestion of columns and configuration. You gave me some good suggestions in the past that have worked.
I will contact Supelco after to order the necessary parts.
thank you

[chromatographer1]

The configuration is a two column heart-cut with backflush.

The nitrogen elutes at about 1/4th the time of krypton, about 12 seconds at the beginning of the heart-cut, the cut being about 6 to 12 seconds in width, and then the backflush is operated.

You may be able to do a simple backflush to vent, but I suggest that you don't for best results. If it doesn't give you a high background with your detector, go ahead and do a simple backflush at about 30-35 seconds.

Other details you can discuss with Supelco Technical Service.

How does it feel to get $5000 worth of information for FREE ?

best wishes,

Rodney George
unpaid and unemployed consultant

[tigerk2001]

Thats is a real GC guy!!!
As usual, a lot of accurate details!!! Good

I'll get in contact with Supelco for the right columns.

Do you have a good contact name I could get in contact with in Supelco

thanks again

[tigerk2001]

One more thing for you, Rodney.
Could it be possible to send to my email (dgagne@solutionld.com)your personnal information. Just in case I would need your support in future.
Let me know if it is possible.
many thanks
Dany

[chromatographer1]

Dany,

Here is my email address and my home address is:

chromatographer1@aol.com
3501 SE Adams Drive
Blue Springs, Missouri USA 64014

816-600-8290 is my phone

best wishes,

Rodney George
consultant