“…Hafnium. The most complete and up-to-date information on the analytical chemistry of hafnium is available in the recent publication of : ¿ward end Jacobs (¿Sb Radiochemical methods fern determin-)g hafnium hi zirconium include one i -y Amano in which hafnium is measured l>v b'otope dilution (6) and another by Nakai and Yaiinia employing activation analysis (138). A spectrograph; c method for hafnium in zirconium using a barium fluoride flux was also reported ; / 15).…”