方波伏安法同时测定U_3O_8中Cu、Ph、Zn、Cd、Fe、Co、Ni、Mn  

SIMULTANEOUS DETERMINATION OF Cu, Pb, Zn, Cd, Fe, Co,Ni AND Mn IN U_3O_8 BY SQUARE WAVE VOLTAMMETRY

作　　者：封国宁[1] 陈红波 李铁球 

机构地区：[1]铀矿开采研究所

出　　处：《铀矿冶》1994年第4期239-244,共6页Uranium Mining and Metallurgy

摘　　要：Ｕ３Ｏ８试样用硝酸分解后，用ＴＢＰ－ＣＣｌ４溶液萃取分离铀，水相用ＨＣｌＯ４蒸干，残渣溶于０．０５ｍｏｌ／Ｌ的ＨＣｌＯ４和０．０３ｍｏｌ／Ｌ的酒石酸混合底液中，用方波阳极溶出伏安法测定Ｃｕ、Ｐｂ、Ｚｎ、Ｃｄ，然后用氨水调节ｐＨ为９．５，用方波极谱法测定Ｆｅ、Ｍｎ，最后加入２０μＬ丁二酮肟用络合物吸附波催化方波极谱法测定Ｎｉ、Ｃｏ．标样测定结果接近给出的中位值，精密度高．变异系数在２．１％－９．７％之间。The U3O8 sample was dissolved in nitric acid, and the uranium was removed by extraction with TBP-CCI4 solution three times. The aqueous solution was evaporated to dryness with Perchloric acid, and the residue was dissolved in a 10mL mixture containing 0. 05mol/L perchloric acid and 0. 03mol/L tartaric acid. The copper, lead, zinc, cadmium were determined by square wave anodic stripping voltammetry at--1. 20 to--0.15V (vs. Ag/AgCl).The solution was further treated with ammonium hydroxide to make PH about 9. 5, and the iron, manganese were determined by square wave polarography at--1. 20 to--1. 70V. Finally 20mL 5×10-2mol/L dimethylglyxime solution was added, and the nickel and cobalt were determined by complex adsorption wave catalytic square polarography at--0. 90 to-1. 30V.

关 键 词：方波伏安法 U3O3 杂质元素 铀 测定 

分 类 号：O615.2[理学—无机化学]