论文部分内容阅读
本工作用化学处理与光谱分析的操作制订一较简单的分析法,适用于测定以铈组为主的希土混合物中个别组分的含量。根据Fassel的方法,希土元素及钍从矿石中用化学方法分离后,以容量法测定铈,再加入纯铈,提高氧化铈含量至80.0％。所得之混合氯化物溶液加到经液体石腊处理过的碳电极上,在电热板上干燥后,用活化交流电弧作激发光源在3,500—4,500A波段内摄谱,进行La,Nd,Sm,Pr,Y,Gd,Dy,Yb及Er的含量测定。钍在紫外摄谱。单次摄谱的均方误差在2.9—8.8％间。根据用含量变动范围较大的标准试料所作的工作曲线以及本法具体应用于独居石中希土及钍的混合物的分析结果,说明本法中没有元素互相干扰以及系统误差。此外,在工作中还比较希土元素粉末试料在直流碳电弧中及其氯化物溶液在碳电极表面上干燥后在交流电弧中的蒸发特性,并观察希土氯化物,硝酸盐及硫酸盐在后一光源中对谱线强度的影响。
This work with the chemical processing and spectral analysis of the operation to develop a simple analysis, suitable for the determination of cerium-based group of rare earth mixture of individual components. According to the method of Fassel, after the separation of the rare earth elements and thorium from the ore by chemical methods, the cerium is measured by the volumetric method and pure cerium is added to increase the cerium oxide content to 80.0%. The resulting mixed chloride solution was added to the liquid paraffin-treated carbon electrode, dried on a hot plate, activated AC arc as the excitation light source in the 3,500-4,500 A band spectroscopy, the La, Nd, Sm, Pr, Y, Gd, Dy, Yb and Er contents. Thorium in UV spectroscopy. The mean square error of a single shot was between 2.9-8.8%. According to the working curve made by the standard sample with larger content fluctuation range and the analysis results of this method applied to the mixture of the rare earth stone and the thorium in the monazite, it shows that there is no element mutual interference and systematic error in this law. In addition, during the work, the evaporation characteristics of rare earth element powder sample in DC arc carbon arc and its chloride solution on the carbon electrode surface after drying were also compared, and the effects of rare earth chloride, nitrate and sulfate Effect of line intensity on the latter light source.