title: Determination of rhenium in molybdenite by X-ray fluorescence: A combined chemical-spectrometric technique.
abstract: Rhenium in molybdenite is separated from molybdenum by distillation of rhenium heptoxide from a perchloric-sulphuric acid mixture. It is concentrated by precipitation of the sulphide and then determined by X-ray fluorescence. From 3 to 1000 microg of rhenium can be measured with a precision generally within 2%. The procedure tolerates larger amounts of molybdenum than the usual colorimetric methods.
authors.affiliation: U.S. Geological Survey, Denver, CO, U.S.A.
authors.forename: M W
authors.initials: MW
authors.lastname: Solt
authors.forename: J S
authors.initials: JS
authors.lastname: Wahlberg
authors.forename: A T
authors.initials: AT
authors.lastname: Myers