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以N_(203)作萃取剂,吸附树脂DA_(201)作载体组成固定相,用于萃取层折铀和钍。选择3M HCl-1.7M NaCl进柱,铀的萃取率大于98%,钍随流动相出柱,柱中铀被0.2M HNO_3洗提,用Br-PADAP光度法测定;用2M HNO_3进柱,钍的萃取率大于98%,铀随流动相出柱,柱中钍被4M HCl洗提后,用偶氮胂Ⅲ光度法测定。两分离方法对铀、钍有较高的选择性,一柱两用,可作为光度法测定矿石中铀和钍的有效的预分离手段。实验部分一主要试剂和层析柱的制备铀、钍标准溶液及0.05%Br-PADAP和0.05%偶氮胂Ⅲ溶液,同文献。 N_(265):主要成份为氯化三烷基甲基铵(上海跃龙化工厂产)。称100克稠状N_(263)溶于150毫升磺化煤油中,加辛醇-[2]10毫升作为添加剂。 DA_(201):二乙烯苯-丙烯腈共聚物,系弱极性吸附
N_ (203) was used as extractant and DA_ (201) adsorbent was used as stationary phase to extract uranium and thorium. Select 3M HCl-1.7M NaCl into the column, the extraction rate of uranium is greater than 98%, thorium with the mobile phase out of the column, uranium was 0.2M HNO_3 column was stripped, with Br-PADAP spectrophotometric determination; 2M HNO_3 into the column, thorium Of the extraction rate is greater than 98%, uranium with the mobile phase out of the column thorium was eluted with 4M HCl, with arsenazo Ⅲ spectrophotometric determination. The two separation methods have higher selectivity for uranium and thorium, and one column and two columns, which can be used as an effective pre-separation method for photometric determination of uranium and thorium in ore. Experimental part A main reagent and chromatographic column Preparation of uranium, thorium standard solution and 0.05% Br-PADAP and 0.05% arsenazo Ⅲ solution, with the literature. N_ (265): The main ingredient is trialkyl methyl ammonium chloride (Shanghai Yuelong Chemical Plant production). Weigh 100 grams thick N_ (263) dissolved in 150 ml of sulfonated kerosene, plus octanol - [2] 10 ml as an additive. DA_ (201): divinylbenzene-acrylonitrile copolymer, Department of weakly polar adsorption