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本文阐述了用交流示波极谱滴定法测定高钙镁铅锌矿中的锌。在NH_4Cl—NH_3H_2O(pH=10)支持电解质中采用微银汞膜电极进行实验。分别用NH_4F和铜试剂掩蔽钙、镁、铜、铅、镉及其它竽金属元素。铁和铝不干扰测定。用EDTA滴定锌获得令人满意的结果,对两种矿样分析,准标偏差为0.05%和0.07%。该法快速准确,适用于测定高钙镁的铅锌矿中锌。
This paper describes the determination of zinc in high-Ca-Mg-Pb-Zn ore by AC Oscillopolarographic titration. The experiments were carried out using a micro-silver mercury electrode in NH_4Cl-NH_3H_2O (pH = 10) supporting electrolyte. Masking of calcium, magnesium, copper, lead, cadmium, and other metal elements with NH_4F and copper reagents, respectively. Iron and aluminum do not interfere with the determination. Satisfactory results were obtained with titration of zinc with EDTA, with the standard deviation of 0.05% and 0.07% for both samples. The method is fast and accurate and is suitable for the determination of zinc in lead-zinc ore with high calcium and magnesium.