Technetium sulphides

Phillips and Timms [599] described a less general method. They converted germanium and silicon in alloys into hydrides and further into chlorides by contact with gold trichloride. They performed GC on a column packed with 13% of silicone 702 on Celite with the use of a gas-density balance for detection. Juvet and Fischer [600] developed a special reactor coupled directly to the chromatographic column, in which they fluorinated metals in alloys, carbides, oxides, sulphides and salts. In these samples, they determined quantitatively uranium, sulphur, selenium, technetium, tungsten, molybdenum, rhenium, silicon, boron, osmium, vanadium, iridium and platinum as fluorides. They performed the analysis on a PTFE column packed with 15% of Kel-F oil No. 10 on Chromosorb T. Prior to analysis the column was conditioned with fluorine and chlorine trifluoride in order to remove moisture and reactive organic compounds. The thermal conductivity detector was equipped with nickel-coated filaments resistant to corrosion with metal fluorides. Fig. 5.34 illustrates the analysis of tungsten, rhenium and osmium fluorides by this method. 

Council of Europe (2005 a) Technetium ""Tc colloidal rhenium sulphide injection. Emopean pharmacopeia 5.0, monograph, no 126. Council of Europe, Maisonneuve, Sainte-Ruffine Council of Europe (2005 b) Technetimn " Tc sulfur colloid injection. Emopean pharmacopeia 5.0, monograph, no 131. Coimcil of Emope, Maisonneuve, Sainte-Ruffine Haney TA, Ascanio I, Gighotti JA, Gusmano EA, Bruno GA (1971) Physical and biological properties of a " Tc-sulfur colloid preparation containing disodium edetate. J Nucl Med 12 64-68... 

Studies on the sorption of technetium by various minerals demonstrate that only a few percent of pertechnetate arc sorbed by tuff and basalt and that granite, dolomite, and shale sorbed only small amounts (< ()%). However, minerals containing copper, lead or iron sulphide, c.g. bournonite, galena, and chalcopyrite. sorbed pertechnetate... 

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