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N-苯醯-N-苯胲为沉淀剂分离和测定铌钽,是基于酒石酸介质中,在不同pH值的条件下,分别沉淀铌、钽,是目前比较方便的方法之一。我们在此基础上,分别采用两次盐酸丹宁法和一次盐酸丹宁法预先分离大部分伴生元素,然后用N-苯酰-N-苯胲沉淀分离测定铌和钽。同时对pH与铌钽沉淀率的关系;过滤时的温度对铌钽沉淀溶解度的影响;pH对铌钽彼此分离的影响;铌钽的比例与分析效率的关系;沉淀剂的用量等条件作了试验。结果证明,在酒石酸介质下酸
N-Benzene-N-Benzene 胲 as precipitant separation and determination of niobium tantalum is based on the tartaric acid medium, at different pH conditions, respectively, precipitation of niobium, tantalum, is one of the more convenient method. On this basis, we separated the majority of the accompanying elements by two tannin and one tannin respectively, and then separated and determined the niobium and tantalum by N-benzoyl-N-benzo-phenanthrene precipitation. The relationship between pH and the precipitation rate of niobium and tantalum; the influence of temperature on the solubility of niobium and tantalum precipitation during filtration; the influence of pH on the separation of niobium and tantalum; the relation between the ratio of niobium and tantalum and the analysis efficiency; test. The results show that the tartaric acid medium