【摘要】 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、N₂₃₅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^-7μg（U）/l和4.4×10³μg（Th）/l。更多还原

【Abstract】 In this paper the concentration for the coexisted uranium and thorium in water with basic magnesium carbonate, as a new inorganic adsorbent-coprecipitant, has been studied. The results have shown that it can efficiently concentrate trace uranium and thorium in water and the adsorptivity is greater than 94% under certain conditions. A method based on this has been developed for the successive determination of trace uranium and thorium in water by using extractant N₂₅₆, The recovery is equal to or greater than 92% and the relative standard deviation is less than 11%. The detection limit of the method for coexisted uranium and thorium can reach down to 1.4×10^-2 μg（U）/l and 4.4×10^-3μg（Th）/l.更多还原