微量铌的催化极谱测定已有报导。我们以二苯基乙醇酸代替文献中采用的苦杏仁酸,並应用示波导数极谱法在氯酸钾-二苯基乙醇酸-四甲基溴化铵底液中测定铌,使分析速度和灵敏度有所提高。本文对铌的测定条件、干扰元素及其分离、催化波的性质进行了 Catalytic polarography of trace niobium has been reported. We used diphenylglycolic acid instead of the mandelic acid used in the literature and determined the niobium content in the potassium chlorate-diphenylglycolic acid-tetramethylammonium bromide bottom solution using oscillographic derivative polarography, allowing the speed and sensitivity of analysis has seen an increase. In this paper, the determination of niobium conditions, interference elements and their separation, the nature of the catalytic wave