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本文介绍了锆的间接极谱测定法。该方法是基于锆用间硝基苯甲酸来沉淀,过滤,洗滌后,再溶解沉淀于过氯酸和酒石酸的混合热溶液中,以隣苯二甲酸氢鉀为支持电解质,α—萘酚为极大抑止剂,极谱测定与沉淀中锆相当的间硝基苯甲酸的含量。讨论了适于间接极谱测定锆的条件。本方法可望适用于大量鈾、铈、和钍存在下微量锆的测定,其相对误差不大于4％。为了验证其适用性,已将本法用于含少量铁的锆英石中锆的测定,得到了与经典的比色法相符的结果。
This article describes the indirect determination of zirconium polarography. The method is based on the zirconium precipitation with m-nitrobenzoic acid, filtered, washed, and then dissolved in a precipitate was precipitated in a mixed hot solution of perchloric acid and tartaric acid, potassium hydrogen phthalate as a supporting electrolyte, α-naphthol Great Inhibitor, Polarographic determination of the amount of m-nitrobenzoic acid equivalent to the precipitated zirconium. The conditions for the determination of zirconium by indirect polarography are discussed. The method is expected to be suitable for the determination of trace zirconium in the presence of a large amount of uranium, cerium and thorium with a relative error of not more than 4%. In order to verify its suitability, this method has been applied to the determination of zirconium in zircon with a small amount of iron and results consistent with classical colorimetry.