THE DETERMINATION OF THORIUM AND URANIUM AS TRACE IMPURITIES IN BERYLLIUM METAL

摘要

A method for the determination of microgram quantities of thorium and uranium in beryllium metal has been developed. Both thorium and uranium are separated from beryllium in a nitrate system by a tri-n-octylphosphine oxide extraction. Thorium is subsequently re-extracted from the organic phase into 0.3 M sulphuric acid and is determined colorimetrically by thoron. Uranium re¬mains in the organic phase and is determined directly by a fluorophotometric method.