Download or read book The Spectrophotometric Determination of Uranium by the Thiocyanate-TBP Method written by and published by . This book was released on 1968 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The thiocyanate-TBP method has been used daily at the National Institute for Metallurgy for approximately nine years for the determination of small amounts of uranium in Witwatersrand conglomerate and other siliceous ores. It replaced a spectrophotometric method that required the separation of uranium from most other elements in the sample by extraction with ether. The method involves the formation of uranyl thiocyanate complex of uranium in the presence of EDTA and sodium formate, the extraction of the complex into tri-n-butyl phosphate (TBP), and the measurement of the transmittance of the solvent phase. The procedure is applicable to ore samples, filter cakes and aqueous solutions of low uranium content. The thiocyanate-TBP method has several advantages over the 'ether' method.