Determination of rhenium in molybdenite by X-ray fluorescence: A combined chemical-spectrometric technique.
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.
Solt
M W
MW
U.S. Geological Survey, Denver, CO, U.S.A.
Wahlberg
J S
JS
Myers
A T
AT