Simple Technique for the Ultrapurification of Helium
Although helium containing no more than 5 to 50 ppm of total impurities is commercially available in quantity, there sometimes is a need for higher purity, particularly in fundamental helium research and for use as a carrier gas in chromatography.
KeywordsTotal Impurity Cryogenic Engineer Helium Impurity Coconut Charcoal Charcoal Trap
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