Dosage de traces d'hafnium dans l'aluminium par activation neutronique

Abstract

Three methods are proposed for the assay of traces of hafnium in aluminium metal by neutron activation analysis. In the first method, the isotope 179mHf (T = 19 s), produced is counted after anionic resin exchange‐separation in sulfuric acid medium. The two other methods, which are non‐destructive, are based on the formation of 180mHf (T = 5,5 h) and 179mHf (T = 19 s). The latter method comprises an instrumental separation.

Nonferrous metallurgy. I. Light metals: aluminum, beryllium, titanium, and magnesium

“…Hafnium. Balsenc and Haerdi (24) proposed three methods for the determination of traces of hafnium in aluminum by neutron activation analysis. Lobanov et al ( 157) also determined hafnium in titanium using neutron activation with a sensitivity of 10_6%.…”

Nonferrous metallurgy. II. Zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, and tungsten

“…A separation by precipitation as hafnium phenyiarsonate was used in the determination of hafnium in natural samples (82). Nondestructive methods were used for the determination of hafnium in zircon (681), aluminum (36), niobium (391), molybdenum (383), titanium (390), diamonds (476), and silicate rocks (91) .…”