title: Preparation and purity measurement of extremely pure helium gas.
abstract: 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.
authors.affiliation: Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125.
authors.forename: J T
authors.initials: JT
authors.lastname: Yates
authors.forename: J J
authors.initials: JJ
authors.lastname: Zinck
authors.forename: W H
authors.initials: WH
authors.lastname: Weinberg