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本文利用铌与草酸形成很稳定的无色可溶性络合物的事实,消除了大量铌的干扰。提出在纯铌或纯铌化合物中微量钨的快速溯定方法。该方法测定的相对误差不大于20％。分析所需要的时间仅在4小时以内。
In this paper, the fact that niobium and oxalic acid form very stable colorless and soluble complexes eliminates the interference of a large amount of niobium. A rapid dating method of trace tungsten in pure niobium or pure niobium compounds is proposed. The relative error measured by this method is not more than 20%. The time required for the analysis is only within 4 hours.