论文部分内容阅读
本文在详细地研究了稀土-二安替比啉甲烷-I~-三元络合物形成及萃取条件的基础上,提出用CHCl_3选择萃取铁、镍合金中的微量稀土元素,达到微量稀土与基体成份定量分离。用PH 3.8乙酸铵溶液反萃取收集在25ml量瓶中。在苦杏仁酸、磺基水扬酸等络合剂存在下,借偶氮肿(Ⅲ)光度法测定。在确定的最佳分离及测定条件下,大多数金属离子不干扰测定。方法的测定下限为0.001%,标准偏差<0.50,变异系数7。
In this paper, the formation and extraction conditions of rare earth-diantipyrne methane-I-ternary complex were studied in detail. It was proposed that the rare earth elements in iron and nickel alloys should be selectively extracted with CHCl 3 to reach the trace rare earth Matrix components quantitative separation. Re-extract with a pH 3.8 ammonium acetate solution and collect in a 25 ml volumetric flask. In the presence of mandelic acid, sulfosalicylic acid and other complexing agents, by azo (III) spectrophotometry. Under the conditions of the determination of the best separation and determination, most of the metal ions do not interfere with the determination. The method has a lower limit of determination of 0.001%, a standard deviation of <0.50 and a coefficient of variation of 7.