TOPO Extraction-Photometric Method for Simultaneous Determination of Uranium and Thorium in Geochemical Samples
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The sample solution in 2 N nitric acid tnediurn was extracted with trioctyl- phosphine oxide (TOPO) in cyclo,hexane solution in the present of ascobic acid, boric acid and aluminium salts, and backextracting with 2 N-HN03 contain ing 0.8% NH4F solution. Uranium was determined in TOPO layer with 5-Br- PADa1P, and thorium was determined in aqueous solution with arsenazo III.Its C. V. for sample containing 1.3ppm U and 1.6ppm Th were 9·0% and 3 .6% respectively (n=8).
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任奇钰,张建国,何亚非,1984,TOPO萃取光度法连续测定地球化学样品中的铀和钍[J].岩石矿物学杂志,3(3):274~276.,1984,TOPO Extraction-Photometric Method for Simultaneous Determination of Uranium and Thorium in Geochemical Samples[J]. Acta Petrologica et Mineralogica,3(3):274~276.
