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本文是配合混合稀土分离工艺流程的研究而建立的分析方法,分析的对象是流程中的粗产品,不追求高的灵敏度,只要求方法可靠。为了降低电弧的漂移,选择了氯化钡做载体,起到了稳定弧焰的作用,提高了分析方法的精密度。流程产品中八个稀土杂质元素的测定范围是(以氧化物计):镧、钬、镝和铒为0.050—3.2％,钇、铥、镱和镥为0.020—1.28％;相对标准偏差为2.3—6.1％。 1.标准样品的制备和待分析样品的前处理:称取定量的经850℃灼烧2小时后的纯稀土氧化物,以纯氧化钇为基体,依次稀释法配制成一套标准样品,每个样品都用2倍缓冲剂(5％纯BaCl_2+95％纯碳
This article is based on the study of mixed rare earth separation process to establish the analysis method, the analysis of the object is the process of crude products, not the pursuit of high sensitivity, only requires a reliable method. In order to reduce the drift of the arc, barium chloride was chosen as the carrier, which played the role of stabilizing arc flame and improved the precision of the analytical method. The measurement range of the eight rare earth impurity elements in the process product is (in terms of oxide): 0.050-3.2% for lanthanum, holmium, dysprosium and erbium, and 0.020-1.28% for yttrium, gallium, ytterbium and gallium; the relative standard deviation is 2.3 -6.1%. 1. Preparation of standard samples and samples to be analyzed Pretreatment: Weigh a quantitative amount of pure rare earth oxides after 2 hours of burning at 850 ℃, with pure yttrium oxide as the base, followed by dilution to prepare a set of standard samples, each sample Both buffers were used (5% pure BaCl 2 + 95% pure carbon