Preparation and purity measurement of extremely pure helium gas.
A procedure is described for the production, storage, and handling of very pure helium gas and for the measurement of its purity in the part per 10(11) range.
Yates
J T
JT
Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125.
Zinck
J J
JJ
Weinberg
W H
WH