standard mixture of gases (oxygenates)
Posted: Thu May 12, 2005 5:24 pm
I intend to use a gas mixture of oxygenates (aldeydes, ketones, alcohols with C2-3, propylene oxide) as a standard for gc. Would it be stable a mix like that?
I cannot give you an answer from experience directly, but I would give you an opinion having worked with aldehydes, ketones, and alcohols:
It probably would not be stable over the long term. especially if these were mixed together, and at anything over a VERY LOW ppm level, and if stored at anywhere near ambient temperatures.
But I could be wrong.
I would suggest a series of permeation tubes in series to use dynamic mixing as you use the standard of ethane and propane (ethylene-propylene?) gas. That might be a better choice.