What is the best analytical instrument for analyzing the various components in liquid oxygen?
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What is the best analytical instrument for analyzing the various components in liquid oxygen? Especially for hydrocarbons and noble gases.
This post was last edited by qugd on 2011-10-20 08:37. It is of course an online chromatograph that allows for the easy analysis of trace organic compounds in liquid oxygen, including the highly dangerous acetylene; the minimum detectable concentration is around 0.05 ppm. Other components such as methane, ethane, ethylene, carbon 3, and carbon 4 can be detected using a FID detector. For trace amounts of carbon monoxide and carbon dioxide, an online chromatograph equipped with a methane converter and an FID detector can be used. Note that if liquid oxygen samples are used, the sample pretreatment system is extremely important.