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研究了碱式碳酸镁作为一种新的无机吸附共沉淀剂对水中共存铀钍的富集效果结果表明,碱式碳酸镁能有效地富集共存的痕量铀钍,在一定条件下,吸附率达94％以上。在此基础上,作者以破式碳酸镁为共沉淀剂、N_(235)为萃取剂,实现了水中痕量铀钍的连续测定。测定方法的全程回收率≥92％,相对标准偏差≤11％,检出限可达1.4×10~(-7)μg(U)/l和4.4×10~3μg(Th)/l。
The effect of basic magnesium carbonate as a new inorganic adsorption coprecipitator on the enrichment of uranium-thorium coexisting in water was studied. The results show that the basic magnesium carbonate can effectively enrich the trace uranium-thorium coexisting. Under certain conditions, Rate of 94% or more. On the basis of this, the continuous determination of trace uranium and thorium in water was achieved by using the broken-in magnesium carbonate as coprecipitator and N_ (235) as extractant. The recovery rate of the method was ≥92% with the relative standard deviation ≤11%. The detection limit was up to 1.4 × 10 ~ (-7) μg / L and 4.4 × 10 ~ 3μg (Th) / l.