| TOPO萃取光度法连续测定地球化学样品中的铀和钍 |
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| 引用本文： | 任奇钰,张建国,何亚非.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,1984,3(3):274-276. |
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| 作者姓名： | 任奇钰 张建国 何亚非 |
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| 作者单位： | 四川地质矿产局实验室，四川地质矿产局实验室，四川地质矿产局实验室 成都地质学院1982年毕业生，成都地质学院1982年毕业生 |
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| 摘 要： | 铀、钍在地壳中的含量平均约3ppm至8ppm。地球化学探矿样品一般要求测定低于地壳平均值的含量,如1—2ppm的铀或钍。在一次分离的溶液中测定两个痕量元素是最可取的。Pollock在抗坏血酸存在下以硼酸掩蔽氟,用TOPO(三辛基氧膦)的环己烷溶液一次萃取铀
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TOPO Extraction-Photometric Method for Simultaneous Determination of Uranium and Thorium in Geochemical Samples |
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| Abstract: | 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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